10 Pieces you need to form the perfect maternity wardrobe
Building the perfect maternity wardrobe doesn't have to be overwhelming. Whether you're searching for stylish maternity clothing, comfortable pregnancy wear, or versatile bump-friendly outfits, investing in quality maternity essentials will see you through every trimester in style. Isabella Oliver has become synonymous with premium maternity fashion, offering expectant mothers beautifully designed maternity dresses, maternity jeans, maternity tops, and maternity blazers that combine sustainable practices with impeccable fit.
Isabella Oliver is not just a sustainable, certified B Corp maternity brand, but one of the highest-scoring fashion B Corps globally. They create pregnancy clothes using responsible materials like organic cotton maternity wear, TENCEL™ Lyocell, and LENZING™ ECOVERO™ Viscose. Their maternity collection features over-the-bump maternity jeans, under-the-bump options, nursing-friendly designs, and postpartum clothing that transitions seamlessly beyond pregnancy. From maternity workwear to casual maternity outfits, maternity loungewear to occasion wear, these are the essential maternity wardrobe pieces every pregnant woman needs. Discover below the best maternity clothing that flatters your bump, supports your changing body, and makes getting dressed during pregnancy an absolute joy.
1. Kelsy Maternity Dress with TENCEL™ - Classic Navy
Why It's Perfect for Your Maternity Wardrobe:
The Kelsy Maternity Dress is Isabella Oliver's answer to effortless everyday dressing throughout pregnancy and beyond. This elevated maternity shirt dress has earned rave reviews from major publications, with Grazia Magazine praising it as perfect for both pregnancy and the breastfeeding phase. Crafted from sustainable TENCEL™ Lyocell, this eco-friendly maternity dress offers an easy, structured silhouette that works for virtually any occasion.
Available Colourways & Sizes:
Classic Navy
Available in sizes 0-5 (UK sizes 4-18)
Fits small to size, Isabella Oliver suggests sizing up from your usual size
What Makes It Great:
The genius of this maternity dress lies in its adjustable side ties that sit above the bump, creating a flattering silhouette that grows with you through every stage of pregnancy. The classic shirt dress design features full-length sleeves with convenient roll-up tabs, making it incredibly versatile for layering or wearing solo. The TENCEL™ Lyocell fabric is not only planet-friendly but incredibly soft against sensitive pregnancy skin, draping beautifully without clinging.
What truly sets this nursing dress apart is its functionality beyond pregnancy - the button-front design makes it ideal for breastfeeding, ensuring you'll reach for it long after baby arrives. Style it with maternity leggings and trainers for weekend errands, or dress it up with a maternity blazer and ankle boots for work meetings. With an impressive 78% sustainability score on Isabella Oliver's index, this is conscious maternity fashion at its finest.
Shop the Kelsy Maternity Dress
2. Super Stretch Maternity Skinny Jean - Dark Denim
Why It's Perfect for Your Maternity Wardrobe:
Finding the perfect pair of maternity jeans can transform your entire pregnancy wardrobe, and Isabella Oliver's Super Stretch Maternity Skinny Jean consistently ranks as one of the best maternity denim options available. Glamour.com praised these organic cotton maternity jeans as so comfortable you could justify wearing them as loungewear, noting the exceptional bump-supporting panel that remains comfortable even at 36 weeks pregnant.
Available Colourways & Sizes:
Dark Denim (classic indigo wash)
Caviar Black
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
These aren't just maternity jeans - they're an investment in comfort that will carry you through your entire pregnancy journey. Made from 99% organic cotton with just 1% elastane, they offer the perfect balance of stretch and structure. The soft organic denim feels luxuriously supple against your skin, while the bump-hugging jersey panel provides all-day support without any tightness or restriction.
The skinny leg shape is timelessly flattering and incredibly versatile, pairing effortlessly with everything from maternity tops and oversized sweaters to crisp white shirts and blazers. The over-the-bump design offers gentle support that grows with you, eliminating the constant need to pull up your jeans throughout the day.
The 29-inch inside leg provides a flattering length that works beautifully with both flats and heels. These pregnancy jeans are a foundation piece that you'll wear on repeat - they're the denim equivalent of your favourite pre-pregnancy jeans, only better adapted to your changing body.
Shop the Super Stretch Maternity Skinny Jean
3. Over the Bump Organic Cotton Maternity Boyfriend Jeans - Washed Indigo
Why It's Perfect for Your Maternity Wardrobe:
For those days when you want that effortlessly cool, off-duty look, Isabella Oliver's Maternity Boyfriend Jeans are the staple piece I have been reaching for. Easy to pair with anything in my wardrobe, these are the maternity jeans I’ve been loving for when I want to feel stylish without trying too hard.
Available Colourways & Sizes:
Washed Indigo
Washed Black
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
The magic of these boyfriend-fit maternity jeans lies in their authentic denim look combined with pregnancy-specific comfort features. Isabella Oliver has reinvented their much-loved boyfriend jean by adding an over-the-bump jersey band, creating an even more comfortable and flattering style that maintains the classic boyfriend jean aesthetic. The tapered leg and authentic stretch cotton denim construction mean these jeans look and feel like your favourite non-maternity pair.
Unlike skinny maternity jeans, the relaxed boyfriend cut provides extra room through the hip and thigh - perfect for those days when you want comfort without sacrificing style. The over-the-bump waistband offers supportive coverage that you can wear throughout your entire pregnancy, growing seamlessly with your bump.
Shop the Over the Bump Maternity Boyfriend Jeans
4. Lisbeth Maternity Blazer - Caviar Black
Why It's Perfect for Your Maternity Wardrobe:
A tailored maternity blazer is one of the most versatile investments you can make for your pregnancy wardrobe whether you’re regularly in the office or in need of something smarter to jazz up an evening outfit. This is the structured maternity jacket that takes you from important presentations to dinner dates, instantly elevating any outfit with its polished sophistication.
Available Colourways & Sizes:
Caviar Black
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
What sets the Lisbeth apart from standard blazers is its bump-specific tailoring. Cut specifically to contour around your growing bump rather than simply being oversized, this maternity blazer maintains the sharp lines and tailored details of a traditional jacket while providing the comfort and movement pregnancy demands. The structured LENZING™ ECOVERO™ Viscose ponte fabric is a heavyweight jersey that holds its shape beautifully while offering subtle stretch - it looks crisp and professional while feeling comfortable enough for all-day wear.
The fully lined construction and welt pockets add luxury details, while the button cuffs and self-tie fabric belt allow you to customize the fit as your body changes. The concealed button closure creates clean lines that won't pull or gap across your bump.
Shop the Lisbeth Maternity Blazer
5. Arden Organic Maternity Top - Navy & White Stripe
Why It's Perfect for Your Maternity Wardrobe:
Every maternity wardrobe needs a classic Breton stripe top, and the Arden Organic Maternity Top delivers this timeless essential with pregnant-friendly design features. This contemporary take on the Breton stripe has become a versatile favourite that works throughout pregnancy and beyond. It's the kind of effortless maternity top you'll find yourself reaching for week after week.
Available Colourways & Sizes:
Navy & White Stripe
Soft White & Crimson
Antique White & Caviar Black
Soft White & Khaki
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
Crafted from 100% organic cotton jersey, the Arden offers the perfect weight and quality you want in an everyday maternity top - substantial enough to wear alone but light enough for comfortable layering. The heavyweight cotton has a beautiful drape and feel that only improves with washing, becoming softer while maintaining its shape. The graphic wide stripes add contemporary visual interest while the classic boat neck cut creates an elegant neckline that won't feel restrictive.
The relaxed, longline shape is specifically designed to accommodate your growing bump without clinging or riding up - a common frustration with non-maternity tops during pregnancy. The slightly oversized silhouette creates effortless weekend style that pairs perfectly with maternity jeans, leggings, or casual trousers.
Shop the Arden Organic Maternity Top
6. Araminta Maternity Dress with LENZING™ ECOVERO™ - Caviar Black
Why It's Perfect for Your Maternity Wardrobe:
If you could only buy one maternity dress for your entire pregnancy, the Araminta should be it. This is the flattering, pared-back little black maternity dress designed to live in throughout your pregnancy journey. It's the dress that solves those "what do I wear?" moments with effortless sophistication, working equally well for professional meetings, social occasions, and everything in between.
Available Colourways & Sizes:
Caviar Black
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
The genius of the Araminta lies in its deceptively simple design that's actually packed with pregnancy-specific features. The ruched waist detail is the key to its versatility - this clever design element grows beautifully with your bump, creating flattering gathering that defines your waist without constriction. Made from soft, eco-friendly LENZING™ ECOVERO™ Viscose jersey, the fabric feels wonderful against your skin while draping elegantly over your changing shape.
The three-quarter length sleeves provide ideal coverage for professional settings while remaining comfortable, and the midi length finishing just below the knee creates a sophisticated silhouette that works across seasons. The side seam ruching ensures a flattering fit at every stage of pregnancy - early on, the ruching creates gentle gathering, while later it beautifully accommodates your full bump.
Shop the Araminta Maternity Dress
7. Kerrison Maternity Leggings - Caviar Black
Why It's Perfect for Your Maternity Wardrobe:
The Independent calls these leggings among the best maternity essentials you can buy, praising their bump-supportive design and environmental credentials. Maternity leggings are arguably the hardest-working piece in any pregnancy wardrobe, and the Kerrison Maternity Leggings deliver elevated style that makes them suitable far beyond just loungewear or gym wear.
Available Colourways & Sizes:
Caviar Black
Available in sizes 0-5 (UK sizes 4-18)
Fits true to size
What Makes It Great:
What distinguishes these from basic maternity leggings is their elevated design and premium fabric quality. Made from LENZING™ ECOVERO™ Viscose jersey (95%) with 5% elastane, they offer a more refined, dressier alternative to cotton leggings while still providing supreme comfort. The fabric has a subtle sheen and drape that makes these leggings appropriate for occasions where standard cotton leggings would feel too casual.
The supportive over-the-bump panel is thoughtfully designed - it provides coverage and gentle support without feeling restrictive or rolling down throughout the day. Unlike under-the-bump styles that can slip and require constant adjustment, the over-the-bump design stays securely in place, growing with you through every stage of pregnancy. The clean silhouette without excessive detailing creates a streamlined look that won't add bulk under dresses or long tops.
These versatile maternity leggings pair beautifully with the Isabella Oliver Lounge Hoodie for relaxed days at home, work perfectly under maternity dresses and long tops, or can be styled with tunics and blazers for more polished looks. The 24 7/8-inch inside leg creates flattering proportions, and you can continue wearing them postpartum for nursing ease thanks to their comfortable waistband design.
Shop the Kerrison Maternity Leggings
8. Abi Maternity Jumper - Grey Marl
Why It's Perfect for Your Maternity Wardrobe:
The Abi Maternity Jumper redefines cosy luxury for pregnant women. This isn't just another pregnancy sweater - it's an investment piece crafted from Greencash, Isabella Oliver's innovative sustainable yarn that combines recycled wool, cashmere, polyamide, and TENCEL™ Lyocell. It's the kind of jumper I have found myself reaching for day after day during this pregnancy.
Available Colourways & Sizes:
Grey Marl
Powder Pink
Khaki
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
The Abi's standout feature is its Greencash fabric - a responsible blend containing 70% recycled fibres that has approximately 85% less environmental impact than conventional wool thanks to massive water savings, reduced pollution, waste, CO2 emissions, and natural resource use. But sustainability doesn't mean compromising on luxury - this maternity jumper feels incredibly soft with subtle cashmere content that adds that special something against your skin.
This is loungewear you genuinely can leave the house in - it's polished enough for casual coffee dates, grocery shopping, or weekend activities while remaining comfortable enough for relaxing at home. Layer it over maternity leggings or pair it with maternity jeans for effortless maternity style. The grey marl colourway is universally flattering and hides any spills (crucial for postpartum life!), while the knit texture adds visual interest without overwhelming your look.
Shop the Abi Maternity Jumper
9. 'Bun in the Oven' Smart Works Charity Maternity T-Shirt
This organic cotton maternity tee represents conscious fashion that gives back. Made with minimal environmental impact, it's a purchase you can feel genuinely good about - both for the planet and for the women the Smart Works charity supports.
This is the kind of effortless maternity casualwear staple you'll reach for again and again - perfect for weekend errands with maternity jeans, comfortable enough for lounging at home with maternity leggings, yet smart enough to layer under blazers or cardigans for casual office days. The playful 'Bun in the Oven' slogan adds personality and humour to your pregnancy wardrobe, making it a fun conversation starter wherever you go.
The beauty of this charity collaboration piece lies in its versatility and comfort. The pure organic cotton fabric is breathable, soft, and gentle on sensitive pregnancy skin, whilst the relaxed silhouette ensures you're never restricted as your bump grows.
What Makes It Great:
The Viola 'Bun in the Oven' Tee is in support of Smart Works, a UK charity that empowers unemployed women with interview clothing and coaching. This is maternity wear with purpose - a playful essential tee that supports a meaningful cause. Fifty percent of net proceeds from the sales of this tee are donated to Smart Works, helping more women gain the confidence and tools to re-enter the workforce and transform their lives.
Available Colourways & Sizes:
Available in sizes 0-5 (UK sizes 4-18)
Shop the Viola Organic Cotton Maternity Tee - 'Bun in the Oven' - Pure White
10. Cassie Maternity Dress - Caviar Black
Why It's Perfect for Your Maternity Wardrobe:
The Cassie Maternity Dress is where minimalism meets trend-conscious design. This is the sophisticated maternity dress for women who appreciate clean lines, quality fabrics, and timeless style. It's proof that maternity fashion can be every bit as elegant and refined as your pre-pregnancy wardrobe.
Available Colourways & Sizes:
Caviar Black
Available in sizes 0-5 (UK sizes 4-18)
What Makes It Great:
Cut from premium LENZING™ ECOVERO™ Viscose jersey (95%) with 5% elastane, the Cassie delivers that perfect balance of structure and stretch that makes quality maternity clothing worth investing in. The elegant neckline and slim fit create a polished silhouette that feels modern and sophisticated without trying too hard. This is the kind of maternity dress that doesn't announce "maternity wear" - it simply looks like beautiful, well-designed fashion that happens to accommodate your bump.
The three-quarter length sleeves are ideal for professional settings and transitional weather, while the hem finishing just below the knee creates classic proportions that flatter various body types and heights. The side seam ruching is strategically placed to ensure a flattering fit at every stage of pregnancy - it gathers beautifully around your bump while maintaining clean lines elsewhere.
The dress wears and washes brilliantly, maintaining its shape and colour even with frequent wear. Style it with a maternity blazer and heels for work, throw on a leather jacket and ankle boots for weekend chic.
Shop the Cassie Maternity Dress
Building Your Perfect Maternity Capsule Wardrobe
With these carefully selected Isabella Oliver pieces, you have the foundation of a truly versatile maternity wardrobe that will serve you beautifully throughout pregnancy and beyond. These maternity essentials cover all your needs - from work-appropriate maternity clothing to comfortable weekend maternity wear, from smart maternity blazers to casual maternity tops and dresses.
The beauty of Isabella Oliver's approach to maternity fashion is their commitment to quality over quantity. Each piece is designed with longevity in mind - the sustainable fabrics wash beautifully, the timeless designs won't date, and the thoughtful pregnancy-specific features mean these clothes actually work for your changing body rather than just being oversized versions of regular clothing.
Investing in premium maternity wear might feel like a splurge, but when you consider these pieces will carry you through nine months of pregnancy, work for postpartum recovery, and in many cases continue into your regular wardrobe, the cost-per-wear becomes incredibly reasonable. Plus, Isabella Oliver's commitment to sustainable, ethical maternity fashion means you can feel good about these purchases beyond just how they look and feel.
Explore the full Isabella Oliver collection at isabellaoliver.com
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