Best Adjustable Strap One-Piece Swimsuits for Girls of 2026

Name: JiAmy Girls Swimsuit One Piece Ruched Front Retro Kids Swimming Costume Adjustable Straps UV Swimwear Bathing Suit 13 Years
Brand: JiAmy

John Zimmer

Last Updated: 3 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

The adjustable strap one-piece swimsuits are stylish and practical swimwear options for girls. These swimsuits feature adjustable straps that allow for a customizable fit, ensuring comfort and support in the water. With a variety of colours and patterns available, girls can choose a swimsuit that suits their personal style. Made from high-quality materials, these swimsuits are durable and designed to withstand frequent use. Whether for swimming lessons or beach outings, the adjustable strap one-piece swimsuits are a great choice for girls who want to look and feel their best in the water.

At a Glance: Our Top Picks

#TOP 1

JiAmy Girls Swimsuit One Piece Ruched Front Retro Kids Swimming Costume Adjustable Straps UV Swimwear Bathing Suit 13 Years

9.8

Buy on Amazon Read Review

JiAmy Girls Swimsuit One Piece Ruched Front Retro Kids Swimming Costume Adjustable Straps UV Swimwear Bathing Suit 13 Years

#TOP1

9.8

Read Review

#TOP 2

7-16 Years Girls Swimming Costume One Piece Kids Swimming Costume Girls Swimsuit Adjustable Spaghetti Strap Swim Suit Kids

9.7

Buy on Amazon Read Review

7-16 Years Girls Swimming Costume One Piece Kids Swimming Costume Girls Swimsuit Adjustable Spaghetti Strap Swim Suit Kids

#TOP2

9.7

Read Review

#TOP 3

XiaoMoSha Swimming Costume Girls One Piece Bathing Suit

9.5

Buy on Amazon Read Review

XiaoMoSha Swimming Costume Girls One Piece Bathing Suit

#TOP3

9.5

Read Review

Top 10 Adjustable Strap One-Piece Swimsuits for Girls

#TOP 1

JiAmy Girls Swimsuit One Piece Ruched Front Retro Kids Swimming Costume Adjustable Straps UV Swimwear Bathing Suit 13 Years

JiAmy

Black

13 Years

JiAmy Girls Swimsuit One Piece Ruched Front Retro Kids Swimming Costume Adjustable Straps UV Swimwear Bathing Suit 13 Years, Black

9.8

FTB Score

Buy on Amazon

Find on eBay

Features

Classic & Elegant Design: This Swimming Suit For Girls Features A Timeless Solid Colour Design Accented With Subtle Ruched Front Panelling, Offering A Stylish And Flattering Look That Stands Out Without Loud Patterns. Perfect For Parents And Girls Who Appreciate Simple, Elegant Style.

Premium Material：Crafted From A High-Quality Blend Of 82% Polyamide And 18% Spandex, This Kids Swimsuit Is Soft, Durable And Colourfast. The Fabric Holds Its Shape And Vibrant Colour Wash After Wash.

Versatile Summer Wear：The Ideal Swimsuit For Girls For Swimming Lessons, Surfing, Pool Parties, And Beach Outings. Its Classic Design And Reliable Sun Protection Make It A Summer Perfect Choice For Girls Aged 5-13.

Quick-Dry: Made From Lightweight, Breathable, And Quick-Drying Material, This Swim Suit Kids Keeps Your Child Comfortable In And Out Of The Water.It's Easy To Care For And Ideal For Pool Days Or Beach Holidays. Removable Pads For 13 Years And Above, No Pads For The Rest Of The Age Group

Comfortable Fit: JiAmy This Kids Swimming Costume Designed For Active Play, The Wide Adjustable Straps And Full-Coverage Back Provide A Secure, Supportive Fit That Stays In Place During Swimming And Beach Play. The Second-Skin Feel Ensures All-Day Comfort Without Digging Or Slipping.

Read more Read less

#TOP 2

7-16 Years Girls Swimming Costume One Piece Kids Swimming Costume Girls Swimsuit Adjustable Spaghetti Strap Swim Suit Kids

Lancry

Lancry-NKOOHT04-250526

Black

11-12 Years

7-16 Years Girls Swimming Costume One Piece Kids Swimming Costume Girls Swimsuit Adjustable Spaghetti Strap Swim Suit Kids (with Removable Padding) (UK, Age, 11 Years, 12 Years, Regular, Black)

9.7

FTB Score

Buy on Amazon

Find on eBay

Features

‍[ADJUSTABLE & REMOVABLE PAD DESIGN] : This Kids Swimming Costume Features Adjustable Spaghetti Straps, Removable Pads, And Adjustable Side Drawstrings, Which Fit The Body And Provide Optimal Support And Comfortable Fit For Active Children.

‍[ULTIMATE COMFORT] : This Girls Swimming Costume Is Made Of 85% Polyamide And 15% Spandex Fabric, Which Is Soft And Stretchy. The Breathable Quick-Drying Fabric Ensures Maximum Comfort, Perfect For All-Day Wear At The Beach Or Pool.

‍[SUMMER FUN] : This Swimming Costume Girls Is Perfect For Swimming Lessons, Beach Vacations Or Pool Parties, And Is A Must-Have For Summer Fun!

‍[SUITABLE FOR GIRLS 7-16] : This One Piece Swimsuit Girls Size Is Suitable For Girls Aged 7 To 16. Please Refer To The Detailed Size Chart For The Perfect Fit. Machine Washable And Durable.

‍[ONE-PIECE SWIMSUIT] : This Girls Swimsuit Features A One-Piece Design, Providing Better Body Coverage And Excellent UV Protection. It Can Reduce Water Flow Resistance, Increase Swimming Speed, And Is Easy To Put On And Take Off.

Read more Read less

#TOP 3

XiaoMoSha Swimming Costume Girls One Piece Bathing Suit

XiaoMoSha

Green

9-10 Years

XiaoMoSha Swimming Costume Girls One Piece Bathing Suit with Adjustable Straps Color Contrast Trim for Teens Girls, 10-11 Years, Green

9.5

FTB Score

Buy on Amazon

Find on eBay

Features

[Vibrant Colors] Available In Black Swimming Costume Girls Love, Dark Blue, Hot Pink, Green, Orange Flower, And Pink Leopard Patterns Offering Stylish Options For Girls Of All Ages From 6 To 16 Years. The Swimwear Is Not Easy To Fade After Wash

[Unique Comfort] Girls Swimming Costume Features Premium Stretch Fabric With Stitch Costume Design To Ensure A Snug Fit And Freedom Of Movement Ideal As Period Swimwear For Teens And Kids Swimming Costume Alike

[Versatile Ages & Sizes] Suitable For Girls Aged 6 Years Up To 16 Years, This One-Piece Swimsuit Is A Top Choice For Girls Vacation Outfits And Is Perfect For Beach Activities, Swimming Pool, Vacation, Holiday, Children's Day And Surf Party, Photo Shooting And Etc

[High-Quality Material] Swimming Suit For Girls Is Made From High-Quality Fabric, With Shell Of 82%Nylon+18%Elastane And Lining Of 90%Polyester+10%Elastane, Uses Soft And Lightweight Material That Keeps Your Child Comfortable During Poolside Fun Play

[Design] Shell Embroidered Contrast Trim, Removable Chest Pad And Adjustable Shoulder Straps At Back Provides Greater Support For Comfort And Security For All-Day Wear. Removable Pads For 10-16 Years Old, No Pads For The Rest Of The Age Group

Read more Read less

#TOP 4

InfiniZer Girls Swimming Costume, Stretchy One Piece Swimsuit

InfiniZer

Black

15-16 Years

InfiniZer Girls Swimming Costume, Stretchy One Piece Swimsuit Cover

InfiniZer Girls Swimming Costume, Stretchy One Piece Swimsuit with Adjustable Straps Bathing Suit for Girls Swimwear Black

9.5

FTB Score

Buy on Amazon

Find on eBay

Features

[HIGH-QUALITY FABRIC] : The Girls Swimming Costume Is Made Of High-Quality Fabric That Is Soft And Delicate, With Excellent Breathability And Moisture Wicking Properties, Providing A Comfortable Wearing Experience For Your Child, Keeping Them Dry And Comfortable, And Reducing Stuffiness.

[UNIQUE DESIGN] : The Swimming Costume Girls Features Adjustable Cross-Straps And A Classic Black Design, Creating A Simple Yet Stylish Look That Makes It Easy For Your Child To Stand Out In The Pool Or At The Beach.

[VERSATILE] : The Girls' Swimsuits Are Perfect For The Beach, Swimming, Sunbathing, Spas, Vacations, Surfing, Swim Lessons, Water Parks, And More. They Are A Must-Have Summer Item.

[SLIM FIT] : The Girls Swimsuit Elastic Fit Conforms To Your Child's Body Without Feeling Restrictive, Allowing Your Child To Swim And Play Freely And Fully Enjoy The Water.

[SIZING OPTIONS] : The Girls' One-Piece Swimsuits Are Available In A Variety Of Sizes. Please Check The Size Chart Before Purchasing. Please Note That Only Sizes Aged 11 And Above Come With Removable Bra Pads.

Read more Read less

#TOP 5

JiAmy Girls One Piece Swimsuit Adjustable Straps Mermaid Swimming Costume Kids Swimwear Bathing Suit

JiAmy

TA300731

Purple Mermaid

6-7 Years

JiAmy Girls One Piece Swimsuit Adjustable Straps Mermaid Swimming Costume Kids Swimwear Bathing Suit Cover

JiAmy Girls One Piece Swimsuit Adjustable Straps Mermaid Swimming Costume Kids Swimwear Bathing Suit for Kids Purple Mermaid 6-7 Years

9.3

FTB Score

Buy on Amazon

Find on eBay

Features

Adjustable Straps That Grow With Your Child: Designed With Adjustable Shoulder Straps To Ensure A Secure And Comfortable Fit As Your Child Grows. Reduces Sizing Worries For Parents And Allows Longer Wear Throughout The Season.

Comfortable One-Piece With Skirted Coverage: This Girls One-Piece Swimsuit Features A Built-In Skirt Design That Provides Extra Coverage And Confidence While Swimming. Perfect For Active Little Girls Who Love To Move, Play, And Enjoy The Water Without Ride-Up.

Soft, Stretchy & Skin-Friendly Fabric: Made From Soft, Breathable, And Stretchy Fabric That Feels Gentle On Kids' Skin. Comfortable For All-Day Wear At The Beach, Pool, Water Park, Or Family Vacation.

Great Gift For Summer: This Super Cute Girls Mermaid Swimsuit Is Ideal For Swim Lessons And Beach Days, Making Every Summer Moment Special.

Cute Skirted Style Girls Love: Adorable Skirted Swimsuit Design Adds A Fun And Playful Look That Girls Love, While Still Keeping A Classic One-Piece Structure Parents Trust. A Perfect Balance Of Cute And Practical.

Read more Read less

#TOP 6

InfiniZer Girls One Piece Swimsuit Swimming Costume Body Bathing Suit Swim Suit

InfiniZer

Black-white

11-12 Years

InfiniZer Girls One Piece Swimsuit Swimming Costume Body Bathing Suit Swim Suit Cover

InfiniZer Girls One Piece Swimsuit Swimming Costume Body Bathing Suit Swim Suit with Adjustable Straps for Kids Teenager Age 5-16 (Age 11-12 Years, Black-White)

9.1

FTB Score

Buy on Amazon

Find on eBay

Features

[SOFT, QUICK-DRY & COMFORTABLE FABRIC] Crafted From A Premium Blend Of Nylon And Spandex, Our Teen Bathing Suits Are Exceptionally Soft, Stretchy, And Comfortable. The Lightweight, Breathable Fabric Dries Quickly, Making It Ideal For All-Day Wear During Swimming, Playing, Or Lounging By The Water, Ensuring Maximum Comfort For Your Active Girl.

[STYLISH & VIBRANT ONE-PIECE SWIMSUIT FOR GIRLS] Make A Splash With This Beautifully Designed One-Piece Swimsuit For Girls. Featuring A Fashionable Colour-Block Pattern And Vibrant Hues, This Swimming Costume For Girls Ensures Your Teen Stands Out At The Beach Or Pool. It's The Perfect Blend Of Unique Style And Fun For Any Young Fashionista.

[VERSATILE FOR ALL WATER ACTIVITIES & MULTIPLE SIZES] This Versatile Swimming Suit For Girls Is Perfect For Numerous Occasions, From Beach Holidays And Pool Parties To Swimming Lessons And Water Sports. We Offer A Wide Range Of Sizes For Ages 5-6, 7-8, 9-10, 11-12, 13-14, And 15-16 Years. Please Consult Our Size Chart To Find The Ideal Fit For Your Teen.

[EASY CARE & RELIABLE QUALITY] Our Girls Bathing Suits Are Made For Convenience And Durability. They Are Easy To Care For, Being Machine Washable (no Bleach). We Are Committed To Quality; If You Have Any Questions About Our Swimsuits For Teens, Please Don't Hesitate To Contact Our Friendly Customer Service Team For Assistance.

[ADJUSTABLE & SUPPORTIVE FIT FOR ACTIVE TEENS] Designed For A Perfect Fit, This One-Piece Swimsuit Girls Love Features Adjustable Straps And Removable Padding (please Note: Sizes For 5-10 Years Do Not Include Padding). This Thoughtful Design Allows For Customisable Support And A Flattering Silhouette, Providing Freedom Of Movement For Swimming, Surfing, Or Splashing About.

Read more Read less

#TOP 7

Ewbob Girls One Piece Swimsuit Quick Dry Swimwear Swimming Costume Cross Adjustable Straps Beach Bathing Suit

Ewbob

Pinkflower

7-8 Years

Ewbob Girls One Piece Swimsuit Quick Dry Swimwear Swimming Costume Cross Adjustable Straps Beach Bathing Suit Cover

Ewbob Girls One Piece Swimsuit Quick Dry Swimwear Swimming Costume Cross Adjustable Straps Beach Bathing Suit for 5-14 Years(C18-005)-PinkFlower-7-8Y

9.0

FTB Score

Buy on Amazon

Find on eBay

Features

[Quick Drying] Girls One Piece Swimsuit Is Made Of Quick Drying Material, Light Weight And Breathable Fabric,comfortable To Wear

[Material] Girls Swimsuits Are Made Of 85% Polyester And 15% Spandex, The Fabric Is Soft And Durable With Excellent Stretch And Comfort To Ensure Freedom Of Movement

[Unique Pattern] The Swimsuit For Girl With The Fade-Resistant Colorful Patterns，make Your Girl Stand Out In Beachside Pool Settings，perfect For Summer Water Outings

[Unique Design] Swimming Costume Girls Has Adjustable Buckles And The Length Can Be Adjusted As Needed

[Occasion] The Kids Swimming Costume Is Perfect For Swimming, Surfing, Bathing, Beachwear Or Pool, Also Great For Learning To Swim

Read more Read less

#TOP 8

Fjquamitix Girls Swimming Costume with Cover Up Skirt

Fjquamitix

Black

11-12 Years

Fjquamitix Girls Swimming Costume with Cover Up Skirt Cover

Fjquamitix Girls Swimming Costume with Cover Up Skirt, Cut Out Girls One Piece Swimsuit Beach Bathing Suit Adjustable Straps Black

9.0

FTB Score

Buy on Amazon

Find on eBay

Features

[SOFT FABRIC] : The Swimming Costume Girls Is Made Of 82% Polyester And 12% Elastane, Which Is Soft, Skin-Friendly, Breathable, Lightweight, And Quick-Drying, Providing Children With A Comfortable Wearing Experience.

[UNIQUE DESIGN] : The Girls Swimming Costume Has A Hollow Petal Design On The Side, Paired With A Cover-Up, Which Is Cute And Fashionable, Showing Personality, Allowing Children To Easily Stand Out On The Beach.

[SIZE SELECTION] : The Swimsuit Girls Offers A Variety Of Sizes For You To Choose From, Suitable For Girls Aged 7-8, 9-10, 11-12, 13-14, And 15-16.

[MULTIPLE SCENES] :The One Piece Swimsuit For Girls Is Very Suitable For The Beach, Swimming, Sunbathing, Spa, Vacation, Surfing, Swimming Lessons, Water Parks, Etc. They Are A Must-Have Item For Summer.

[DETAILED DESIGN] : The Girls Swimsuit Is Elastic And Fits The Body Curve, Providing Ample Coverage, Allowing Your Child To Explore Freely In The Water. With Adjustable Spaghetti Straps And Fine Stitching.

Read more Read less

#TOP 9

WIQI Girls' Swimsuit One Piece Bathing Suit Twist Front Cutout Adjustable Straps Ruched Girls' Swimwear Size 9-16

WIQI

CC11393-A3

Grey, Blue

11-12 Years

WIQI Girls' Swimsuit One Piece Bathing Suit Twist Front Cutout Adjustable Straps Ruched Girls' Swimwear Size 9-16 Cover

WIQI Girls' Swimsuit One Piece Bathing Suit Twist Front Cutout Adjustable Straps Ruched Girls' Swimwear Size 9-16, Grey, Blue, 11-12 Years

8.8

FTB Score

Buy on Amazon

Find on eBay

Features

Unique Design The Girls Swimsuit Has A Solid Color Design, Trendy Twist Front Neckline, Adjustable Back Hook, Adjustable Straps, Removable Chest Pads, Which Perfectly Match The Girl's Body.

HIGH QUALITY MATERIAL The Girls Swimsuit Is Made Of 82% Polyamide And 18% Spandex. Soft And Stretchy, Skin-Friendly And Comfortable.

Wide Occasions The Cute Swimwear For Girls Is Suitable For Various Occasions, Whether It's For Swimming, Surfing Or Water Parks, Pool Parties. Make A Splash With This Vibrant Girls Swimsuit.

Size Age: One Piece Swimsuit For Girls Aged 9-16 Years. Before Making Your Purchases, Please Refer To Our Size Chart To Ensure A Perfect Fit.

EASY TO MATCH Fashion Girls Swimsuit Is Easy To Match With Sunglasses, Necklace, Beach Hats And Sandals To Create A Bright And Pretty Summer Look.

Read more Read less

#TOP 10

XiaoMoSha Girls Swimming Costume One Piece Swimsuit

XiaoMoSha

Cute Strawberry

3-4 Years

XiaoMoSha Girls Swimming Costume One Piece Swimsuit Cover

XiaoMoSha Girls Swimming Costume One Piece Swimsuit with Adjustable Straps Breathable Quick Dry Beach Swimwear, CuteStrawberry, 3-4 Years

8.7

FTB Score

Buy on Amazon

Find on eBay

Features

[Adjustable Shoulder Strap] Our One Piece Swimsuit Has Ruffles Sleeve Strap For Adjusting, Ensuring Comfort And Security For All-Day Wear. Let's Your Girls Move Freely, Making Them Perfect For Any Water Activity.

[High-Quality Material] Girls Swimming Costume Is Made Of 82% Polyester And 18% Elastane. Elastic Fabric, Quick Drying, Skin-Friendly And Soft. Vibrant Colors And Keeping The Swimwear Not Easy To Fade After Wash.

[Unique Design] Girls Bathing Suits Have Fashionable And Beautiful Pattern, Such As Mermaid, Flamingo, Floral, Purple Diamond Print, Strawberries Pattern And Etc. The Ruffled Straps And Ruffled Neckline Provide Both Coverage And A Cute, Stylish Look For Your Girl!

[Size Charts] This Swimwear Is Suitable For Little Girls Aged From 3-10 Years Old And Also For Various Body Shapes. You Can Choose A Swimsuit For Your Child Referring To The Size Chart For Comfortable Fit

[Applicable Occasions] Suitable For Beach, Swimming Pool, Swimming Lessons, Vacation, Holiday, Children's Day, Water Sports And Surf Party, Photo Shooting And Etc, Which Is A Great Gift For Little Girls

Read more Read less

Editor's Notes

During our adjustable strap one-piece swimsuit for girls research, we found 306 adjustable strap one-piece swimsuit for girls products and shortlisted 10 quality products. We collected and analyzed 5,779 customer reviews through our big data system to write the adjustable strap one-piece swimsuits for girls list. We found that most customers choose adjustable strap one-piece swimsuits for girls with an average price of £20.00.

The adjustable strap one-piece swimsuits for girls are available for purchase. We have researched hundreds of brands and picked the top brands of adjustable strap one-piece swimsuits for girls, including JiAmy, Lancry, XiaoMoSha, InfiniZer, Ewbob.

Written by

John Zimmer

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.