Best Birthday Bikini Sets for Girls of 2026

Name: Stitch Girls Swimming Costume - 2 Piece Bikini Set
Brand: Cartelyn

John Zimmer

Last Updated: 12 Feb 2026

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If you're looking for the perfect birthday gift for a young girl, consider birthday bikini sets. These sets are designed with vibrant colours, fun patterns, and comfortable materials to make any girl feel special on her special day. Whether she's celebrating at the beach or by the pool, these bikini sets are a stylish and fashionable choice. With a variety of sizes and styles available, there's a birthday bikini set to suit every girl's taste.

At a Glance: Our Top Picks

#TOP 1

Stitch Girls Swimming Costume - 2 Piece Bikini Set

9.8

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Stitch Girls Swimming Costume - 2 Piece Bikini Set

#TOP1

9.8

Read Review

#TOP 2

Dtiaagto Girls Swimsuit 3 Piece Bathing Suits Summer Bikini Tankini Sets Mermaid Tail Swimsuit

9.7

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Dtiaagto Girls Swimsuit 3 Piece Bathing Suits Summer Bikini Tankini Sets Mermaid Tail Swimsuit

#TOP2

9.7

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#TOP 3

Naiyafly Teen Girls' 2 Piece Swimsuit Set Adjustable Straps Color Block Trim Bikini Tops + Briefs High Waist Swimwear

9.5

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Naiyafly Teen Girls' 2 Piece Swimsuit Set Adjustable Straps Color Block Trim Bikini Tops + Briefs High Waist Swimwear

#TOP3

9.5

Read Review

Top 4 Birthday Bikini Sets for Girls

#TOP 1

Stitch Girls Swimming Costume - 2 Piece Bikini Set

Cartelyn

Blue

10 Years

Stitch Girls Swimming Costume – 2 Piece Bikini Set – Fun Character Swimwear for Kids and Tweens (UK, Age, 10 Years, Regular) Blue

9.8

FTB Score

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Features

For Girls Aged 4 To 12 – Ideal Fit For Young Kids And Tweens Who Love Character-Themed Swimwear.

Adorable Stitch Print – Colourful And Fun Design With A Cheerful Stitch Character On The Top.

Comfortable & Practical – Made From Soft, Stretchy Fabric With Adjustable Straps For Freedom Of Movement.

Perfect Gift Idea – A Fun Birthday Or Holiday Gift For Little Stitch Fans.

Chic Pastel Colours – Beautiful Rainbow Tones Add A Trendy Touch To Summer Outfits.

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#TOP 2

Dtiaagto Girls Swimsuit 3 Piece Bathing Suits Summer Bikini Tankini Sets Mermaid Tail Swimsuit

Dtiaagto

Blue

7-8 Years

Dtiaagto Girls Swimsuit 3 Piece Bathing Suits Summer Bikini Tankini Sets Mermaid Tail Swimsuit for 7-8 Years Blue

9.7

FTB Score

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Features

Stunning Visual Appeal: Vibrant Colors That Captured Lots Of Imagination For Kids. The Two-Piece Bathing Suit Matches Perfectly—it Not Only Looks Adorable But Also Compliments The Tail Beautifully.

Material: 82% Polyester And 18% Spandex, Stretchable, Elastic, Flexible With Light Weight, And No Fading.

The Mermaid Tails Are A Dream Come True For Any Little Girl! Oh Look At The Beautiful Mermaid! They Were The Highlight Of The Party—every Child Felt Like A Magical Mermaid.

Mermaid Design：The Fins Have An Opening On The Bottom For The Feet To Come Out.

Ideal Gift: The Mermaid Tail For Girls Make For An Ideal Present For Birthdays, And Holidays, With Their Distinctive Appeal And Fun Feature, Stimulating Their Imagination And Creativity, They Are Sure To Be A Hit With Mermaid Lovers.

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#TOP 3

Naiyafly Teen Girls' 2 Piece Swimsuit Set Adjustable Straps Color Block Trim Bikini Tops + Briefs High Waist Swimwear

Naiyafly

Lake Blue

11-12 Years

Naiyafly Teen Girls' 2 Piece Swimsuit Set Adjustable Straps Color Block Trim Bikini Tops + Briefs High Waist Swimwear with Drawstring Beachwear Bathing Suit for Kids 9-16 Years Lake Blue

9.5

FTB Score

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Features

Soft Material: Two-Piece Swimwear For Teen Is Made From A Blend Of Nylon And Spandex, This Swimsuit Is Soft, Skin-Friendly, Breathable, Comfortable, And Stretchy, Allowing Children To Move Freely And Comfortably.

Teen Girls Swimsuits: This Girls' Bikini Set Features A Trendy Design With A U-Shaped Neckline, Adjustable Shoulder Straps, Removable Chest Pads, And High-Waisted Bottoms With Drawstring Detail And Wave Color Block Trim For A Unique And Stylish Look.

Various Size: The Swimsuit Bikini Is Available In Various Sizes For Teen Girls Aged 9-10 Years, 11-12 Years, 13-14 Years, 15-16 Years, Please Refer To The Size Chart Before Purchasing To Ensure The Perfect Fit For Your Child.

Occasion: The Chic Modest Girls Bathing Suits Is Perfect For Beach, Pool, Swimming, Surfer, Diving, Party, Water Play, Vacation Photoshoots, And Makes A Great Birthday Gift For Girls Who Love To Enjoy Water Activities In Style.

Girl Sport Swimwear: The 2pcs Swimwear Include A Bikini Top + Bikini Bottoms With Drawstring Design Provide A Secure Fit And Tummy Control. 6 Color For You Choose: Pink, Black, Blue, Green, Light Blue And Blue Green.

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#TOP 4

Aulyffo Girls Swimsuits Bikini Set

Aulyffo

Black 2

11-12 Years

Aulyffo Girls Swimsuits Bikini Set Cover

Aulyffo Girls Swimsuits Bikini Set,Two Piece Swimsuit Criss Cross Bathing Suit Girls' Swimwear, Black 2, 11-12 Years

9.3

FTB Score

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Features

Swimsuit Top:The Girls Bikini Top Is v-Neck Design , Criss Cross,adjustable Shoulder Straps,more Color-Pink，Blue，Black ，Red Or Leopard Print, Floral Print Or Two-Color Splicing,removable Bra,elastic Waist For Easy On And Off.

Material:This Girls Bikini Set Is Made Of Polyester And Elastane, The Fabric Is Lightweight,soft,breathable,skin-Friendly,quick-Drying And Comfortable To Wear.

Size: :This Two Piece Swimsuit Is Fit For 7-16 Years Girls.Please Carefully Check The SIZE CHART Before Buy It. Please Allow 1-3cm Differs Due To Manual Measurement.

Occasion:Girls' Swimwear Is Suit For Various Occasions, Such As Beach Holiday, Swimming, Surfing,Bathing Party,Birthday Party, Pool Party, Photography , Hot Springs And So On.

Bikini Bottom: High Waisted Bikini Bottom,The Floral And Leopard Printed Or Solid Decorated The Whole Bathing Suit Looks Cute. This Bikini Is Eye-Catching For Swimwear!

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Editor's Notes

During our birthday bikini set for girls research, we found 82 birthday bikini set for girls products and shortlisted 4 quality products. We collected and analyzed 6,747 customer reviews through our big data system to write the birthday bikini sets for girls list. We found that most customers choose birthday bikini sets for girls with an average price of £20.00.

The birthday bikini sets for girls are available for purchase. We have researched hundreds of brands and picked the top brands of birthday bikini sets for girls, including Cartelyn, Dtiaagto, Naiyafly, Aulyffo.

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.