One Piece Swimwear

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One Piece Swimwear offers a timeless and flattering choice for plus size women seeking confidence and style at the pool or beach. Designed to provide comfort and elegance, these swimsuits are perfect for making a splash while embracing your curves. Explore a variety of colors, patterns, and silhouettes in plus size One Piece Swimwear that help you look and feel your best all season long.

Best Seller

Sarong Front One Piece Swimsuit
by Swimsuits For All

A draped-front one-piece swimsuit in nylon-spandex with tummy control, UPF 50 protection, and full bust support.

~~$94.00~~

From $47.00
Save up to $47 (50%)

What customers like:
Durable and high quality Flattering and slimming fit Attractive and stylish design Good tummy and thigh coverage Comfortable and supportive
Best Seller

Sarong V-Neck Tummy Control One-Piece Swimsuit
by Swim 365

A drapey purple V-neck sarong swimsuit with tummy control, UPF 50 protection, and power-mesh support.

~~$91.99~~

From $45.99
Save up to $46 (50%)

What customers like:
Attractive colors and patterns Flattering and slimming fit High quality material and construction Good coverage and length Comfortable and supportive
Best Seller

Chlorine Resistant Spliced Tank One Piece Swimsuit
by Swimsuits For All

A sporty red one-piece swimsuit with chlorine-resistant, no-fade fabric and Power Mesh tummy control.

~~$94.00~~

From $47.00
Save up to $47 (50%)

What customers like:
Well made and true to size Excellent chlorine resistance and durability Vibrant, beautiful colors that last Flattering and comfortable fit Secure full coverage with tummy control
Best Seller

Chlorine Resistant High Neck One Piece Swimsuit
by Swimsuits For All

A chlorine-resistant one piece swimsuit in durable nylon-spandex with a high neck, tummy control, and UPF 50 protection.

~~$104.00~~

From $52.00
Save up to $52 (50%)

What customers like:
Beautiful, vibrant color and design Durable, chlorine-resistant fabric Supportive bra and bust support Comfortable and flattering fit High neck provides excellent coverage and sun protection
Best Seller

Chlorine Resistant Square Neck Tummy Control One Piece Swimsuit
by Swimsuits For All

A blue one-piece swimsuit with tummy control, UPF 50 protection, and chlorine-resistant, no-fade fabric.

~~$94.00~~

From $37.60
Save up to $56 (60%)

What customers like:
Effective tummy control High quality and well made Chlorine-resistant and durable fabric Comfortable and supportive fit Beautiful color and design
Best Seller

V-Neck One Piece Swimsuit
by Swimsuits For All

A sleek black one-piece swimsuit with tummy control, adjustable straps, and UPF 50 sun protection.

~~$104.00~~

From $62.40
Save up to $42 (40%)

What customers like:
High quality material and construction Flattering fit and style Comfortable and well made Excellent tummy control and support Accurate sizing and great fit
Chlorine Resistant Square Neck Tank One Piece Swimsuit
by Swimsuits For All

A purple one-piece swimsuit with a square neckline, tummy control mesh, and chlorine-resistant, UPF 50 fabric.

~~$104.00~~

From $83.20
Save up to $21 (20%)

What customers like:
Vibrant, attractive colors and patterns True to size and fits well Good tummy control and support Flattering and comfortable fit Chlorine resistant and durable
Best Seller

High-Neck One Piece
by Swim 365

A navy poly/spandex swimsuit featuring tummy control, full-coverage cups, and UPF 50 sun protection.

~~$89.99~~

From $26.98
Save up to $63 (70%)

What customers like:
Supportive with tummy control Attractive color and design Great value for the price Durable, chlorine-resistant material Flattering and comfortable fit
Best Seller

Fringe Bandeau One Piece Swimsuit
by Swimsuits For All

A black nylon-spandex one-piece swimsuit featuring fringe trim, tummy control mesh, and UPF 50 sun protection.

~~$104.00~~

From $52.00
Save up to $52 (50%)

What customers like:
Flattering fit High quality material Supportive and secure Stylish and cute design Comfortable to wear
Best Seller

One-Piece Tank Swimsuit with Adjustable Straps
by Swim 365

A sleek black and white one-piece swimsuit featuring adjustable straps, tummy control, and UPF 50 protection.

~~$89.99~~

From $44.99
Save up to $45 (50%)

What customers like:
Comfortable with adjustable straps High quality and durable material Vibrant colors and stylish appearance Flattering and slimming design Excellent fit and true to size
Best Seller

Chlorine Resistant Tank One Piece Swimsuit
by Swimsuits For All

A chlorine-resistant one-piece swimsuit in durable nylon-spandex with UPF 50 protection and tummy control lining.

~~$94.00~~

From $47.00
Save up to $47 (50%)

What customers like:
High quality and stylish design Supportive with tummy control Flattering and comfortable fit Vibrant and accurate colors Durable and chlorine resistant fabric
Best Seller

Ruched Twist Front One Piece Swimsuit
by Swimsuits For All

A ruched one-piece swimsuit with a twist-front neckline, tummy control, and UPF 50 sun protection.

~~$104.00~~

From $52.00
Save up to $52 (50%)

What customers like:
Flattering fit and design Beautiful colors and appearance High quality and durable fabric Good tummy control and coverage Comfortable and supportive
Best Seller

Lattice Plunge One Piece Swimsuit
by Swimsuits For All

A black one-piece swimsuit featuring a plunging V-neck, lattice trim, tummy control mesh, and UPF 50 protection.

~~$125.00~~

From $50.00
Save up to $75 (60%)

What customers like:
High quality and well made Beautiful color and appearance Flattering fit and style Supportive and comfortable Good coverage and tummy control
Best Seller

High Neck Wrap One Piece Swimsuit
by Swimsuits For All

A navy one-piece swimsuit featuring a high neck, wrap front, adjustable straps, and UPF 50 protection.

~~$125.00~~

From $62.50
Save up to $63 (50%)

What customers like:
Flattering fit and design Comfortable and true to size Supportive and secure construction Bright and attractive colors Good coverage and tummy control
Tank Overlay Tummy Control Adjustable-Strap Swim Romper
by Swim 365

A stylish black and white nylon-spandex swim romper with tummy control, inner cups, and UPF 50 protection.

~~$110.99~~

From $77.99
Save up to $33 (30%)

What customers like:
Flattering and slimming appearance Well made with quality fabric Comfortable and supportive fit Stylish and unique design Good coverage and confidence boosting
Best Seller

High Neck Tummy Control One Piece Swimsuit
by Swimsuits For All

A multi-colored one piece swimsuit featuring a high neck, tummy control mesh, and chlorine-resistant UPF 50 fabric.

~~$104.00~~

From $41.60
Save up to $62 (60%)

What customers like:
Attractive colors and patterns Flattering and supportive design Chlorine-resistant and durable fabric True to size and accurate fit Comfortable fit
Best Seller

Zip-Front One-Piece with Tummy Control
by Swim 365

A black one-piece swimsuit with tummy control, UPF 50 sun protection, and chlorine-resistant nylon/Lycra® fabric.

~~$92.99~~

From $36.99
Save up to $56 (60%)

What customers like:
Durable and chlorine-resistant fabric Secure and reliable front zipper Easy to put on and take off Flattering and slimming design Comfortable fit
Colorblock One-Piece
by Swim 365

A stylish black and white one-piece swimsuit with tummy control, UPF 50 sun protection, and chlorine resistance.

~~$84.99~~

From $41.99
Save up to $43 (51%)

What customers like:
Stays in place during activity Supportive bra cups and tummy control Flattering and comfortable fit Stylish and streamlined design Durable material and color retention
Colorblock One-Piece Swimsuit with Shelf Bra
by Swim 365

A sporty black one-piece swimsuit with racing stripes, tummy control, UPF 50, and chlorine-resistant fabric.

~~$89.99~~

From $44.99
Save up to $45 (50%)

What customers like:
Stays in place during activity Durable and chlorine resistant Flattering and slimming design Good coverage and support Comfortable fit
Empire-Waist Swimsuit with Molded Bra
by Swim 365

An empire-seamed swimsuit in colorfast, chlorine-resistant nylon/Lycra® with tummy control and UPF 50 protection.

~~$89.99~~

From $44.99
Save up to $45 (50%)

What customers like:
High quality and durable construction Bright, colorfast, and chlorine-resistant fabric Great fit and support Comfortable with good coverage Flattering and slimming design
Best Seller

Tank One Piece Swimsuit
by Swimsuits For All

A one-piece swimsuit in nylon-spandex with Power Mesh tummy control, wide straps, and UPF 50 sun protection.

~~$94.00~~

From $56.40
Save up to $38 (40%)

What customers like:
Flattering and slenderizing fit Vibrant colors and attractive patterns Comfortable with good coverage Durable and well made Supportive tummy control and bra coverage
Chlorine Resistant Zip Front One Piece Swimsuit
by Swimsuits For All

A black and royal one-piece swimsuit featuring chlorine-resistant nylon-Lycra fabric, tummy control, and UPF 50 protection.

~~$94.00~~

From $75.20
Save up to $19 (20%)

What customers like:
Flattering and slimming fit Attractive design and color contrast Easy to put on and take off Comfortable with good support Durable chlorine-resistant fabric
Crossback One Piece Swimsuit
by Swimsuits For All

A stylish one-piece swimsuit in splashy patterns with crossback straps, tummy control, and chlorine-resistant nylon-spandex.

~~$104.00~~

From $41.60
Save up to $62 (60%)

What customers like:
Great fit Chlorine resistant Beautiful design and colors Supportive and comfortable Well made and durable
Sarong-Front Swimsuit
by Swim 365

A chic silver one-piece swimsuit featuring a V-neck, decorative beading, mesh detail, and UPF 50 protection.

~~$102.99~~

From $50.99
Save up to $52 (50%)

What customers like:
Beautiful color options Flattering fit Attractive style High quality material Good coverage

Plus size one piece swimwear is a timeless staple for women seeking comfort, support, and effortless style at the beach or pool. Today’s designs offer everything plus size women need, blending fashion-forward details with features that provide confidence and coverage. From sleek black options to vibrant prints, plus size one piece swimsuits come in a range of colors and patterns to flatter every body shape. Catherines’ collection emphasizes supportive features like built-in shelf bras, power mesh linings, tummy control panels, and adjustable straps for a customized fit that embraces curves beautifully. Women shopping for plus size one piece swimwear can expect maximum versatility. These swimsuits provide excellent coverage across the bust, tummy, and hips, while details like ruched fronts or surplice necklines create a visually slimming effect. Many styles feature UPF fabrics and quick-dry materials, perfect for enjoying poolside activities or beach outings with full confidence. With plus size one piece swimwear from Catherines, you don't have to compromise on comfort or design—find the ideal balance of chic silhouettes and functional support tailored specifically for plus size women.