Last Updated: May 21, 2026
Quick Picks: Best Plus-Size Maternity Swimsuits — One Piece
Best Overall
Motherhood Maternity Plus Size One Piece Swimsuit — Ruched belly panel, nursing-friendly design, sizes up to 3X, chlorine-resistant fabric.
Best Support
Angerella Plus Size Maternity Swimwear — Built-in shelf bra with underwire option, tummy ruching accommodates third-trimester belly, wide shoulder straps.
Best Budget Pick
Ecrocoo Plus Maternity One-Piece Swimsuit — Stretchy ruched design, deep V-neck, adjustable straps, affordable price point for a garment worn one season.
Why Trust Our Recommendations
Finding a plus-size maternity swimsuit is a double challenge — most maternity swim brands stop at XL, and most plus-size swim brands do not accommodate a growing belly. Our team specifically looks for suits that accommodate all three trimesters, provide genuine bust support for larger cup sizes common in pregnancy, and are made from chlorine-resistant fabric that holds up through repeated pool use rather than fading and stretching out after a few wears.
Top 3 Plus-Size Maternity One-Piece Swimsuits — Reviewed
1. Motherhood Maternity Plus Size One-Piece — Best Overall
Motherhood Maternity is one of the longest-standing maternity wear brands, and their plus-size one-piece swimsuit brings that pattern-engineering expertise to the pool and beach. The ruched belly panel is designed to expand through all three trimesters — the shirring accommodates a growing bump without the suit becoming uncomfortably tight or losing coverage as the belly grows. The ruching also continues to look intentional and flattering postpartum when the belly is receding.
The shelf bra provides light support adequate for smaller cup sizes, but larger-busted women (DD and above) may want the Angerella option for more structured support. The chlorine-resistant fabric maintains its color and elasticity through a full swimming season — important when a maternity swimsuit may be worn multiple times per week for water aerobics or prenatal swimming classes. Available in solid colors and some prints through 3X.
Best for: All three trimesters, prenatal swim classes, pool and beach use across a full season.
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2. Angerella Plus Size Maternity Swimwear — Best for Bust Support
Breast size increases significantly during pregnancy — often two or more cup sizes — and larger-busted plus-size women need more than a shelf bra to feel supported and comfortable in a swimsuit. The Angerella maternity one-piece addresses this directly with structured cups and optional underwire, providing the lift and separation that makes swimwear comfortable for full-busted women rather than something to endure.
Wide shoulder straps distribute weight across the shoulders rather than concentrating it on thin straps that dig in — a frequent complaint from plus-size women in standard maternity swimwear. The belly ruching expands generously and the suit is cut with a longer torso to avoid riding up on taller plus figures. The suit runs in standard plus sizes rather than maternity-specific sizing, which means it can be purchased at the pre-pregnancy plus size and worn through pregnancy as the belly panel stretches to accommodate growth.
Best for: Plus-size women with D cup and above, third trimester comfort, active swimming over casual wading.
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3. Ecrocoo Plus Maternity One-Piece — Best Budget Pick
Maternity swimwear is a category where many women resist spending significantly because the garment is used for only one season. The Ecrocoo maternity one-piece offers a practical compromise — attractive ruched design, deep V-neckline that adjusts for different bust sizes, and adequate stretch to accommodate a growing belly, at an accessible price point.
The adjustable straps allow lengthening as the torso grows and the suit is pulled downward by a heavier belly — a detail that extends the wearable life of the garment through the third trimester. The fabric has less chlorine resistance than the Motherhood option, making it better suited to occasional pool or beach use rather than weekly swimming classes. For women who will use a maternity swimsuit for a vacation or a few summer outings rather than ongoing swimming, this provides the best value.
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Buying Guide: Plus-Size Maternity One-Piece Swimsuits
Ruching vs. panel construction. Ruched fabric stretches and gathers to accommodate a growing belly and continues to look intentional at any stage. Flat belly panels provide more sun protection but can feel restrictive in the third trimester. For a swimsuit purchased in the first or second trimester that will be worn through delivery, ruching is more adaptable.
Bust support type. Shelf bras (sewn-in soft support) work for A–C cups. Built-in molded cups provide more shape for C–D cups. Underwire is the most supportive option for DD and above but can feel restrictive if the suit is worn for extended pool time. Removable underwire, offered by some brands, provides flexibility.
Chlorine resistance. Chlorine breaks down spandex fiber significantly faster than fresh water or salt water. A swimsuit used for prenatal swimming classes two to three times per week needs chlorine-resistant fabric — typically labeled as such or described as “endurance” construction. Without it, suits lose shape and opacity within weeks of regular pool use.
Sizing approach. Some maternity swimsuits use standard clothing sizes (1X, 2X, 3X) intended to stretch with pregnancy. Others use maternity-specific sizing (S/M/L/XL based on pre-pregnancy size). Check which sizing system is used and buy your pre-pregnancy size unless the brand specifies otherwise — maternity fabrics are engineered with significant stretch built in.
Frequently Asked Questions
Is swimming safe during pregnancy?
Swimming is one of the most recommended exercises during pregnancy — it is low-impact, supports the belly weight through buoyancy, reduces swelling, and maintains cardiovascular fitness. Most obstetricians encourage swimming throughout all trimesters for low-risk pregnancies. Always consult your healthcare provider before starting or continuing any exercise program during pregnancy.
What size maternity swimsuit should I buy in plus size?
Buy your current pre-pregnancy plus size unless the brand specifies a different approach. The belly ruching provides the expansion needed for the bump, while the rest of the suit should fit your current bust, hip, and back dimensions. Buying larger than your current size to “make room” usually results in excess fabric that bunches and sags.
Can I wear a plus-size maternity swimsuit postpartum?
Yes — ruched maternity swimsuits typically continue to look flattering postpartum as the belly recedes, because the ruching gathers in naturally. Many women find a maternity one-piece remains their preferred swimsuit for the first 6 to 12 months postpartum for the tummy coverage and comfort it provides.
Are maternity swimsuits UPF rated?
Some maternity swimsuits include UPF sun protection ratings, but not all. Standard polyester-spandex swimsuit fabric provides roughly UPF 20–30 protection when dry — adequate for most sun exposure during swimming. For extended beach time with significant sun exposure, supplement with sunscreen on uncovered areas and a rash guard or cover-up when out of the water.
How do I keep a maternity swimsuit fitting well through all three trimesters?
Rinse in cold fresh water after every use and air dry flat. Avoid machine drying. Do not wring or twist the fabric. These care habits preserve the spandex elasticity that allows the suit to continue expanding with the belly. A well-cared-for maternity swimsuit should remain comfortable and functional through all three trimesters without losing shape.
Final Verdict
The Motherhood Maternity Plus One-Piece is the most reliable choice for the full pregnancy arc — designed specifically for maternity wear, chlorine-resistant, and available in a genuine plus-size range. Plus-size women needing real bust support should prioritize the Angerella for its structured cup construction and wide straps. The Ecrocoo serves well for occasional seasonal use when budget is the primary constraint. Whichever you choose, prioritize the ruched belly panel and verify that bust and back measurements match your pre-pregnancy dimensions for the best fit throughout pregnancy.
Browse top-rated plus-size maternity swimsuits on Amazon
