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Updated: 06 Apr 2026

10 Best One Piece Swimsuits For Baby Girls

#1 Best Pick
UMELOK Baby Girls' One Piece Swimsuit Rash Guard Swimwear Long Sleeve with UPF 50+ Sun Protection, Colorful Daisy, 9-12 Months

UMELOK Baby Girls' One Piece Swimsuit Rash Guard Swimwear Long Sleeve with UPF 50+ Sun Protection, Colorful Daisy, 9-12 Months

Brand: UMELOK
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  • Baby Girls Rash Guard Swimsuit Features:This swimsuit has 3 buttons at the bottom for easy diaper changing, and a zipper at the collar for easy on and off
  • Full Sun Protection: This long sleeved baby girls swimsuit offers better protection. It ensures that your baby does not suffer from sunburn while playing in the water
  • UPF 50+ SUN PROTECTION:This baby girls swimsuit has a sun protection factor of UPF 50+, which can block 97.5% of harmful UV rays
  • Baby Girls Rash Guard Swimsuit:This baby girls long sleeve rash guard swimsuit is made of high quality fabric,soft and comfortable to wear
  • This baby girls swimsuit is suitable for swimming in lakes, beaches, swimming pools and other occasions. It is also the best choice for baby
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#2 Best Value
TiaoBug Baby/Toddler Girls Long Sleeve Zip Swimwear UPF 50+ One Piece Rash Guard Swimsuit Pink 12-18 Months

TiaoBug Baby/Toddler Girls Long Sleeve Zip Swimwear UPF 50+ One Piece Rash Guard Swimsuit Pink 12-18 Months

Brand: TiaoBug
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  • Swimsuit is made of polyamide and spandex material, hand wash
  • Size Table means age ranges for baby girls, but they are for general guidance only
  • Long sleeves, mock neck, allover is printed with floral pattern. Back with zipper closure for easy dressing. Butt is decorated with ruffles and bowknots at sides
  • press button closure at bottom. Stretchy fabric, comfortable and breathable to wear, quick dry. Fashionable swimwear for your baby girl
  • Suitable for swimming, surfing, bathing, beach wear, etc
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#3 Budget Pick
Happy Town One-Piece Infant Toddler Baby Girl Summer Swimsuit Watermelon Leopard Ruffle Swimwear Bikini Bathing Suit (Leopard, 6-12 Months)

Happy Town One-Piece Infant Toddler Baby Girl Summer Swimsuit Watermelon Leopard Ruffle Swimwear Bikini Bathing Suit (Leopard, 6-12 Months)

Brand: Happy Town
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  • Material: polyester, comfortable and breathable, soft and cozy, skin-friendly
  • Design: lovely ruffle trim decoration; cute leopard or watermelon pattern; best swimsuit for summer baby girl
  • Suggested age: fit for baby under 5 years; please learn more size information from below as reference
  • Occasion: swimming, weekend activities, gift for baby, family gathering, bathing, photograph etc.
  • Package: include 1*swimsuit
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#4 Top Choice
OXUBOAO Girls One Piece Swimsuit for Kids Swimwear Short Sleeve Bathing Suit High Neck Mermaid Swimming Costume (Pink, 7-8T)

OXUBOAO Girls One Piece Swimsuit for Kids Swimwear Short Sleeve Bathing Suit High Neck Mermaid Swimming Costume (Pink, 7-8T)

Brand: OXUBOAO
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  • MATERIAL: Girls swimsuit is made of 85% polyester and 15% elastane, soft, lightweight and smooth. The girls one piece bathing suits are very quick drying and breathable, making your child have lots fun swimming
  • DESIGN: Our kids swimsuits for girls feature a high neck, short sleeves boyleg one piece swimwear. The front zipper has a flap at the top to help prevent scratching while wearing. Girls swimwear has a lined gusset for comfort and coverage
  • MERMAID COSTUME: Your daughter would definitely loves the mermaid style print on this swimsuit. The shades of blue and pink, shiny and attractive, let your little one being a real sea princess when swimming
  • SUN SAFE: The swimwear for girls has a high UPF 50+ sun protection because of the materials used and the coverage it provides. Protects your kids from UV rays, avoiding skin redness and burning, so your daughter can enjoy swimming in the hot weather
  • OCCASION: This one piece mermaid swimsuits girls are good for outdoor activities, like swimming in a swimming pool or learning to swim in colder cottage waters. This girls rashguard swimsuit is also the best gift for your lovely girl
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#5 Popular Choice
weVSwe Baby Toddler Sun Protection Rash Guard One Piece Pink Heart Girls Swimsuit Crotch Zipper for Easy Diaper Changes 12-18M

weVSwe Baby Toddler Sun Protection Rash Guard One Piece Pink Heart Girls Swimsuit Crotch Zipper for Easy Diaper Changes 12-18M

Brand: weVSwe
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  • Extra Zipper Closure at Crotch for Quicker and Easier Diaper Changing.
  • Front Zipper with unique puller for easy on and off and Zipper flap for protection.
  • UPF 50+ swimwear can block over 98% of UVA and UVB rays,no hurts.
  • Durable Fabric in high colorfastness to Chlorine & Sea Water resistant and comfortable touch feeling with 4 way stretch.
  • ISO quality control system and audited BSCI and SEDEX standard for production, which covers the whole swimwear production process.
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#6 Top Pick
Younger Tree Toddler Baby Girls Swimsuit One-Piece Zipper Swimwear UPF 50+ Sun Protection Bathing Suit with Hat, Pink Big Flower, 6-12 Months

Younger Tree Toddler Baby Girls Swimsuit One-Piece Zipper Swimwear UPF 50+ Sun Protection Bathing Suit with Hat, Pink Big Flower, 6-12 Months

Brand: YOUNGER TREE
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  • Baby Girls Rash Guard Swimsuit:The baby girls long sleeve rash guard swimsuit is made of high quality fabric,Stretchy and soft fabric; Skin-friendly; Quickly drying.
  • Unique Design:The baby girl swimsuit has a full zip front design, which is easy to put on or take off, and easy for baby to change diapers
  • Recommended age: Baby girl swimsuit 12-18 months, 18-24 month swimsuit girl.2t-3t swimsuit girl, 3t-4t swimsuit girls, 4t-5t swimsuit girls.
  • This baby girls swimsuit is suitable for swimming in lakes, beaches, swimming pools and other occasions. It is also the best choice for baby gifts.
  • Included: 1*one piece swimsuits+ hat
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#7 Top Pick
Dressy Daisy Baby Girls Minnie One Piece Ruffle Bathing Suit Swimsuit with Headband Swimwear Size 12-18 Months

Dressy Daisy Baby Girls Minnie One Piece Ruffle Bathing Suit Swimsuit with Headband Swimwear Size 12-18 Months

Brand: Dressy Daisy
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  • Adorable polka dot princess one piece swimsuit bathing suit with headband for toddler and little girls. A simple but fun swimwear to get ready for the active sunny days!
  • Ruffles sleeve one-piece with polka dots pattern. Round Neck. Featuring a cute bowknot headband.
  • Made of polyester and spandex fabric. Lightweight, soft, comfy and stretchy materials. Built-in snap closure at the bottom for easy dressing.
  • Sizes for baby girls and toddler children, 0, 1, 1-2, 2, 3, 4, 5, 6. Age is only an approximation of size. Please measure the actual body size and refer to the size chart to choose a proper size for best fit. There may be minor size difference depending on size measuring method.
  • Great for swimsuit, swimwear, bathing suit, beachwear, summer holiday swim wear, pool birthday party swimming suit, vacation, swimming class and lessons, water activities or beach photo shooting.
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#8 Top Pick
Dressy Daisy Baby Girls Princess One Piece Swimsuit Bathing Suit Adventure Swimming Outfit Swimwear with Accessories Size 1-2

Dressy Daisy Baby Girls Princess One Piece Swimsuit Bathing Suit Adventure Swimming Outfit Swimwear with Accessories Size 1-2

Brand: Dressy Daisy
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  • Stunning and cute one-piece girls' princess inspired swimwear with digital print pattern. Wear this swimming costume and sail out to the ocean adventure!
  • Lovely design: One shoulder ruffle swim dress with spaghetti strap. Swim skirt with built-in brief bottom.
  • Made of soft, comfy and breathable materials, no itchy! Flexible and stretchy fabric for easy wearing and taking off.
  • 11 sizes for toddler and little girls, 12-18 Months, 18-24 Months, 2-3, 3-4, 4, 5, 6, 8, 10, 12 and 14. Please measure the actual body size and refer to our size chart to choose a proper size for best fit.
  • Great for swimsuit, swimwear, bathing suit, beachwear, summer holiday swim wear, pool party swimming costume, vacation, swimming class and lessons, water activities or beach photo shooting.
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#9 Top Pick
UMELOK Baby Girls' One Piece Swimsuit Full Zip UPF 50+ Sun Protection Swimwear Rash Guard Swim Suit, Pink, Blue Striped Dinosaur, 6-9 Months

UMELOK Baby Girls' One Piece Swimsuit Full Zip UPF 50+ Sun Protection Swimwear Rash Guard Swim Suit, Pink, Blue Striped Dinosaur, 6-9 Months

Brand: UMELOK
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  • Baby Girls Rash Guard Swimwear:This baby girls long sleeve rash guard swimsuit is made of high quality fabric,soft and comfortable to wear
  • UPF 50+ SUN PROTECTION:This baby girls swimsuit has a sun protection factor of UPF 50+, which can block 97.5% of harmful UV rays
  • Baby Girls Rash Guard Swimsuit Features:This swimsuit has a full zip front design, which is easy to put on and take off, and easy for baby to change diapers
  • This baby girls swimsuit is suitable for swimming in lakes, beaches, swimming pools and other occasions. It is also the best choice for baby
  • Full Sun Protection: This long sleeved baby girls swimsuit offers better protection. It ensures that your baby does not suffer from sunburn while playing in the water
Check latest price on Amazon
#10 Top Pick
KEOYA Baby Girl One-Piece Long Sleeve Rash Guard Swimsuit with Hat Set Floral Zipper for Beach Outings Bathing Suit Swimwear Pink Flowers 0-3M

KEOYA Baby Girl One-Piece Long Sleeve Rash Guard Swimsuit with Hat Set Floral Zipper for Beach Outings Bathing Suit Swimwear Pink Flowers 0-3M

Brand: KEOYA
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  • Key Features: This baby long - sleeve swimsuit + hat set is summer - ready. With a cute floral one - piece design, it's ideal for beaches, pools, water parks, swim classes, surfing, and water games. Stylish and practical for your little one
  • Sun Protection: Made of UPF 50+ fabric, it blocks UV rays to protect baby’s skin. Breathable, quick - dry, and stretchy material ensures comfort and free movement during water play
  • Thoughtful Design: Round neck, smooth zipper for easy wear, elastic cuffs to keep water out, and a crotch design for convenience. The matching hat adds extra sun protection for head and neck
  • Versatile Use: Perfect for family beach trips, local pool visits, swim classes, surfing, or backyard water games. Offers all - round protection and style for baby’s water adventures
  • Sizing & Quality: Available in various sizes. Undergoes strict quality checks. Vibrant, non - fading, skin - friendly prints stay beautiful wash after wash
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