Skip to main content Accessibility Policy

40% Off Best Sellers* - NO CODE NEEDED

Get 20-30% off your first DiaSHOP order* - code: DIAWELCOME

FREE US Standard Shipping on Orders $125+*

Credit Card
Learn More
Don't have your card yet? Apply Today!
Enjoy these top rewards and special benefits when you use the FullBeauty Platinum Credit Card:

Earn Rewards⁶ Every Time You Shop

Earn 20 points for every $1 spent with your card. Available to Silver Tier Only (accumulate 0 to 3,499 points).³

Free Shipping up to 4 Times a Year⁴

Use promo code FBSHIPPING2025
Minimum purchase of $75. Online Only.

A Special Birthday Surprise!⁵

We'll send you an exclusive offer for your orders placed during your birthday month.⁵
Rewards
0 My Bag

0 My Bag

Sign In
Rewards
Deals
Personal Styling
New In
- Dresses
- Jumpsuits
- Tops
- Bottoms
  - Jeans
  - Pants
  - Skirts
- Swimwear
- Outerwear
- Intimates
- Shoes
Dresses
Tops
Outerwear
- Jackets
  - Blazers
  - Vests
- Coats
Bottoms
Brands
- Alder Apparel
- Alex and Ani
- ANNICK
- Atenai London
- Avenue
- AXK Maternity
- BAACAL
- Belldini
- Nabs and Babs
- Nomads Swimwear
- NOOD
- NYDJ
- Poplinen
- Proclaim
- Prologue Shoes
- RBX Active
Wedding Shop
- For the Bride
- Attending a Wedding
Style Edit
- What to Wear
- Best Sellers
  - Dresses
  - Jumpsuits
  - Tops
  - Sweaters
  - Outerwear
  - Jeans
  - Pants
  - Skirts
  - Intimates
  - Loungewear
  - Swimwear
  - Accessories
  - Designer
- Wardrobe Essentials
  - Bottoms
  - Dresses
  - Tops
  - Intimates
  - Sleepwear
- Featured
- Trending Now
Swim
Shoes
- Sandals
- Heels
- Flats
- Mules
- Bridal Shoes
- Wide Width
- Boots
Accessories
- Jewelry
- Belts
- Tights
- Sunglasses
- Hair Accessories
- Handbags
Sale
Personal Styling

Personal Style, Delivered
Get your customized
style box today!

Get Started

Shipping To

Be the first to Know

Stay up to date with all of our great fitting styles and new season arrivals. Plus, enjoy 20-30% off!

Email Address

Thanks for signing up.

Check your inbox to enjoy 20-30% off.

You have 48 hours to use your special offer before it expires!

Thank you for your interest in our brand and your request to receive emails! Unfortunately we are not able to accept orders from your country at this time or send you emails. As such, we will not store your email address at this time. We hope to be able to serve you in the future.

We're sorry, there was a problem adding your email to our list. Please try again later.

Customer Service

Help

Email Us

Call Us 1-800-400-5527

Quick Links

Track My Order

Return Order

Update My Profile

Introducing Dia Rewards! Shop & earn, and get rewarded. Join now (it's free!)

Home
Swim
Plus-Size One-Piece Swimsuits

Plus-Size One-Piece Swimsuits

104 Items

Clear All

SORT BY

104 Items

Clear All

Sort By

Featured

Newest

Top Rated

Highest Price

Lowest Price

FILTER BY

Clear All

Filter

10/12 (6)
14/16 (6)
18/20 (6)
22/24 (9)
26/28 (8)
30/32 (5)
4 (17)
6 (17)
8 (37)
10 (40)
12 (64)
14 (72)
16 (78)
18 (79)
20 (73)
22 (63)
24 (62)
26 (42)
28 (13)
30 (12)
32 (12)
34 (7)
34 D (1)
34 DD (1)
34 E (1)
34 F (1)
36 E (1)
38 E (1)
38 H (1)
36 G (1)
36 H (1)
42 H (1)
40 H (1)
32 DD (1)
32 F (1)
32 E (1)
32 D (1)

black (51)
blue (33)
green (19)
multi (19)
purple (15)
pink (14)
orange (12)
red (11)
white (7)
brown (3)
yellow (2)

Avenue (7)
City Chic (12)
Elomi Swim (1)
Eloquii (4)
Fantasie Swim (1)
Longitude (10)
Nomads Swimwear (6)
Profile By Gottex (6)
Shape Solver Sport (9)
Swimsuits For All (38)
Trimshaper (3)
Unique Vintage (7)

One-Piece Swimwear (83)
Sets (1)
Swimdresses (18)
Swimsuits (99)
Wire Free / Wireless Bras (5)

Chiffon (1)
Crinkle (4)
Crochet (1)
Elastane (24)
Foam (1)
Jacquard (1)
Jersey (7)
Knit (3)
Lycra (7)
Mesh (16)
Microfiber (1)
Nylon (75)
Polyamide (7)
Polyester (17)
Rubber (1)
Silicone (1)
Spandex (68)

Adjustable (29)
Anti Microbial (9)
Asymmetrical Hem (2)
Belted (2)
Built in Bra (32)
Bust Support (2)
Chlorine Resistant (5)
Collarless (51)
Comfort (99)
Compression (1)
Convertible (4)
Cut-Out (8)
Drawstring (4)
Durable (2)
Embellished (1)
Empire Seam (2)
Faux Wrap (2)
Fringe (1)
Handkerchief Hem (2)
Hemmed (28)
High Waist (7)
Hip Minimizer (6)
Lace Trim (1)
Lightweight (2)
Lined (80)
Long Lasting (1)
Made in USA (5)
Plush (1)
Pockets (8)
Printed (37)
Pull-On (2)
Push-Up (1)
Quick Dry (1)
Ribbed (5)
Ruched (16)
Ruffles (15)
Slits (2)
Soft (1)
Solid (1)
Stretch Fabric (170)
Sun Protection (2)
Textured (3)
Tiered (2)
Tummy Control (51)
Twist Front (4)
Underwire (19)
Unhemmed (1)
Unlined (1)
UV Protected (19)
Wire Free / Wireless (44)
Zip Front (5)
Zippers (1)

Short Length (27)
Mid Length (4)

Sleeveless (85)

Halter (2)
High Neck (5)
Keyhole (1)
One Shoulder (5)
Scoop Neck (12)
Square Neck (14)
Strapless/Tube (9)
Sweetheart Neck (7)
V Neck (41)

A-Line (2)
Bootcut (2)
Straight (4)

Swim (99)

Apple (6)
Athletic (7)
Heart (4)
Hourglass (6)
Pear (6)

Maximum Coverage (81)
Moderate Coverage (18)
Minimal Coverage (1)

Adjustable Strap (52)
Cross Back (5)
Shoulder Strap (4)

Maximum Support (27)
Moderate Support (65)
Minimal Support (7)

Up to $19.99 (2)
From $20.00 to $39.99 (5)
From $40.00 to $59.99 (4)
From $60.00 to $79.99 (16)
From $80.00 to $99.99 (14)
From $100.00 to $249.99 (63)

Unique Vintage Plus Size Rainbow Stripe Barbara One Piece Swimsuit
by UNIQUE VINTAGE

SFCC

$123.00
Color Options

Black Bio

Birds of Paradise

PothosNephrite

SkyGeode

Expressivo

IguanaMerlot

Coast One Piece II
by NOMADS SWIMWEAR

SFCC

Price reduced from $150.00 to $220.00 From $75.00 – $220.00
Color Options

BLACK

MINT

Coast One Piece
by NOMADS SWIMWEAR

SFCC

~~Price reduced from $145.00 to~~ $45.00 Save $100.00 68%

5.0 out of 5 Customer Rating (1)
Color Options

BLACK

ROYAL

Adjustable Sarong Swimdress
by Swimsuits For All

SFCC

~~Price reduced from $120.00 to~~ 50% Off with Code: TICKTOCK50
$60.00 with code
Save $60.00 50%
Color Options

Black Bio

Expressivo

IguanaMerlot

SkyGeode

PothosNephrite

Birds of Paradise

Wave One Piece II
by NOMADS SWIMWEAR

SFCC

~~Price reduced from $210.00 to~~ From $105.00 – $210.00
Color Options

BLACK

VERY FUCHSIA

Chain Accent Underwire One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $115.00 to~~ $29.98 – $115.00 50% Off with Code: TICKTOCK50
From $29.98 – $57.50 with code
Save up to $85.02 73%

3.0 out of 5 Customer Rating (1)
Color Options

EMERALD

BLACK

BRIGHT BERRY

PAPAYA

FLUORESCENT PINK

Fringe Bandeau One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $104.00 to~~ 50% Off with Code: TICKTOCK50
$52.00 with code
Save $52.00 50%

4.5 out of 5 Customer Rating (558)
Color Options

BLUE LABYRINTH

NEW GREEN LABYRINTH

BLACK ABSTRACT

PURPLE ABSTRACT

BLUE ABSTRACT

BRIGHT BLUE PALM

PINK UNDERWATER FLORAL

RED LABYRINTH

BLUE FLORAL

Chlorine Resistant Spliced Tank One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $94.00 to~~ 50% Off with Code: TICKTOCK50
$47.00 with code
Save $47.00 50%

4.3 out of 5 Customer Rating (689)
Color Options

CORAL PINK SUN STAMP

BLACK

CINNAMON

AVOCADOS

Tank One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $84.00 to~~ $19.98 – $84.00 50% Off with Code: TICKTOCK50
From $19.98 – $42.00 with code
Save up to $64.02 76%
Best Seller

Color Options

ROYAL HIBISCUS

BLACK WHITE ABSTRACT

SUMMER TROPIC

BLACK

BLACK CHERRY

BLUE HAWAIIAN FLORAL

DEEP SEA

RIO TROPICAL

High Neck Wrap Swimdress
by Swimsuits For All

SFCC

~~Price reduced from $130.00 to~~ 50% Off with Code: TICKTOCK50
$65.00 with code
Save $65.00 50%

4.4 out of 5 Customer Rating (109)
Color Options

MEDITERRANEAN

BLACK

SPICE

MEDITERRANEAN PALMS

BRIGHT BERRY

COOL BLUE FLOWERS

ELECTRIC IRIS

DEEP SEA PURPLE

PALM LEAF

V-Neck One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $104.00 to~~ 50% Off with Code: TICKTOCK50
$52.00 with code
Save $52.00 50%

4.2 out of 5 Customer Rating (348)
Color Options

BLACK

ROYAL

VERY FUCHSIA

SALTWATER HAPPY

BRIGHT BERRY

PARADISE PRIMARY

LUXE

Ruched Twist Front One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $104.00 to~~ 50% Off with Code: TICKTOCK50
$52.00 with code
Save $52.00 50%

4.1 out of 5 Customer Rating (685)
Color Options

MOD BLOOM

BLACK

GREEN BLUE OMBRE

ROSE

PINK GEO SLICES

PAPAYA

VITA BOHO PALMS

RIO TROPICAL

Bandeau Adjustable One Piece
by Swimsuits For All

SFCC

~~Price reduced from $84.00 to~~ 50% Off with Code: TICKTOCK50
$42.00 with code
Save $42.00 50%

4.7 out of 5 Customer Rating (3)
Color Options

BLACK

MILITARY

SPICE

BEAUTIFUL BLUE

RUBY

Shirred Underwire One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $115.00 to~~ 50% Off with Code: TICKTOCK50
$57.50 with code
Save $57.50 50%

4.2 out of 5 Customer Rating (41)
Color Options

BLACK

MEDITERRANEAN

WHITE

SPICE

CORAL PINK

LEMONADE

Underwire Lace Up One Piece Swimsuit
by Swimsuits For All

SFCC

~~Price reduced from $125.00 to~~ 50% Off with Code: TICKTOCK50
$62.50 with code
Save $62.50 50%

3.9 out of 5 Customer Rating (9)

Related Products

Plus-Size One-Piece Swimsuits Plus-Size Swim Ladies' Plus Size Swimsuits Plus Size Summer One Piece Swimsuit Green Plus Size Swimsuit Comfy Plus Size Swimwear Plus-Size Swim Tops Plus Size Traditional Swimwear Plus-Size Swim Bottoms High End Plus Size Swimwear

Flattering Plus Size One Piece Swimsuits Plus Size Ladies Swimsuits Plus Size Halter One Piece Swimsuits Plus Size One Piece Swim Dresses Plus Size Fashionable One Piece Plus Size One Piece Plus Size Women's Swimsuits Plus Size V-Neck Swimsuits Plus Size Retro One Piece Swimsuits Plus Size Patterned Swimsuits

Dia

Be the first to Know

Stay up to date with all of our great fitting styles and new season arrivals. Plus, enjoy 20-30% off!

Email Address

Thanks for signing up.

Check your inbox to enjoy 20-30% off.

You have 48 hours to use your special offer before it expires!

We're sorry, there was a problem adding your email to our list. Please try again later.

Text JOIN to 32469

for exclusive access to special offers & receive 20% off your next purchase!

^*Msg&data rates may apply. Recurring autodialed marketing messages will be sent to the mobile number provided at opt-in.
Consent is not a condition of purchase. Text STOP to quit. T&Cs & Privacy Policy