--- title: "12 month onesies girls — Niche Verdict: Worth a look (55/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/12-month-onesies-girls" last_updated: "2026-07-09T23:11:08.158Z" locale: en meta: description: "12 month onesies girls shows a fragmented shelf (top 5 take 12% of clicks), but a small market ($65K/yr) keeps it on the watch list." "og:description": "12 month onesies girls shows a fragmented shelf (top 5 take 12% of clicks), but a small market ($65K/yr) keeps it on the watch list." "og:title": "12 month onesies girls — Niche Verdict: Worth a look (55/100) | Amazon United States - Flapen" --- Back to Flapen home # **12 month onesies girls** **Worth a look****55/100 ** 12 month onesies girls shows a fragmented shelf (top 5 take 12% of clicks), but a small market ($65K/yr) keeps it on the watch list. **Market/yr** **$65K** **Growth (1y)** **+208.9%** **Products** **181** **Brands** **19** was 19 a year ago **Sellers** **26** **Price range** **$6.55–$32.16** **Returns** **2.1%** **Rating** **4.7★** **Worth a look** Scored 55/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **3** ×0.30 Growth **78** ×0.30 Competition **100** ×0.20 Quality gap **20** ×0.10 Returns **83** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +208.9% year over year. 6K3KPrime Day '24Spike '24Black Friday '24Holiday '24Prime Day '25Spike '25Holiday '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND Peak months: Feb, Nov, Dec · busiest ÷ quietest = 1.9× ## **Competition** - Gerber33% - Simple Joys by Carter's30% - Amazon Essentials12% - Onesies Brand12% - Hudson Baby2% - little planet by carter's2% - Other (13 brands)9% Clicks spread well past the top 5 (12% combined) — an open shelf where new products get seen. 19 brands and 26 sellers compete here. **Brands** **19 **—flat was 19 a year ago **Sellers** **26** **Top 5 brand share** **89%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 18 Months](https://m.media-amazon.com/images/I/31rGj5-Ao5L.jpg) [**Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 18 Months**](https://www.amazon.com/dp/B07GFPRG5K) Gerber$16.624.8★56,1053%▼falling 2 ![Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 12 Months](https://m.media-amazon.com/images/I/31rGj5-Ao5L.jpg) [**Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 12 Months**](https://www.amazon.com/dp/B07GG1P87H) Gerber$16.814.8★56,1052%▼falling 3 ![Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 18 Months](https://m.media-amazon.com/images/I/41hhnzWyrHL.jpg) [**Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 18 Months**](https://www.amazon.com/dp/B073X1WHZD) Simple Joys by Carter's$18.074.8★69,9562%▼falling 4 ![Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Golden Floral 12 Months US](https://m.media-amazon.com/images/I/41LWiwOAgYL.jpg) [**Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Golden Floral 12 Months US**](https://www.amazon.com/dp/B0B6H161PL) Gerber$24.424.8★31,2282%▲rising 5 ![Amazon Essentials Baby Girls Short Sleeve Bodysuit Dress Everyday Dresses Pack of 3 Pink/Apples 18 Months](https://m.media-amazon.com/images/I/41KAL-EIyBL.jpg) [**Amazon Essentials Baby Girls Short Sleeve Bodysuit Dress Everyday Dresses Pack of 3 Pink/Apples 18 Months**](https://www.amazon.com/dp/B0DNFTB3GM) Amazon Essentials$22.734.8★2,4422%▲rising 6 ![Simple Joys by Carters Baby Girls 6-Pack Short-Sleeve Bodysuit Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 12 Months](https://m.media-amazon.com/images/I/41hhnzWyrHL.jpg) [**Simple Joys by Carters Baby Girls 6-Pack Short-Sleeve Bodysuit Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 12 Months**](https://www.amazon.com/dp/B073X31WP5) Simple Joys by Carter's$14.944.8★69,9562%▲rising 7 ![Onesies Brand Baby Boys 8-Pack Short Sleeve Mix & Match Bodysuits and Toddler T-Shirt Set Truck 12 Months US](https://m.media-amazon.com/images/I/51262xsRdCL.jpg) [**Onesies Brand Baby Boys 8-Pack Short Sleeve Mix & Match Bodysuits and Toddler T-Shirt Set Truck 12 Months US**](https://www.amazon.com/dp/B0B6ZBBBMH) Onesies Brand$24.324.8★13,0532%—flat 8 ![Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 6 Animal/Stripe/Geo Tile 18 Months](https://m.media-amazon.com/images/I/41demgaFkjL.jpg) [**Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 6 Animal/Stripe/Geo Tile 18 Months**](https://www.amazon.com/dp/B09M8X29Y1) Simple Joys by Carter's$19.184.9★10,6312%—flat 9 ![Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Lavender Garden 12 Months US](https://m.media-amazon.com/images/I/41Q0-K-5QRL.jpg) [**Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Lavender Garden 12 Months US**](https://www.amazon.com/dp/B0B6GYD2SZ) Gerber$24.794.8★31,2282%—flat 10 ![Amazon Essentials Unisex Toddlers Baby Unisex 6-Pack Sleeveless Bodysuits Pink/Floral 12 Months](https://m.media-amazon.com/images/I/41zPF-H0lcL.jpg) [**Amazon Essentials Unisex Toddlers Baby Unisex 6-Pack Sleeveless Bodysuits Pink/Floral 12 Months**](https://www.amazon.com/dp/B0DNJTL8VW) Amazon Essentials$12.214.8★5,1391%▲rising 11 ![Simple Joys by Carters Baby Boys Short-Sleeve Bodysuit Pack of 6 Multicolor/Alligator/Forest Animals/Stripe 18 Months](https://m.media-amazon.com/images/I/51BfDDCv4+L.jpg) [**Simple Joys by Carters Baby Boys Short-Sleeve Bodysuit Pack of 6 Multicolor/Alligator/Forest Animals/Stripe 18 Months**](https://www.amazon.com/dp/B08XW8BCV3) Simple Joys by Carter's$19.804.8★66,9531%—flat 12 ![Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 8 Navy Heather/White/Oatmeal 12 Months](https://m.media-amazon.com/images/I/41gyZFcVjmL.jpg) [**Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 8 Navy Heather/White/Oatmeal 12 Months**](https://www.amazon.com/dp/B08G8TGLV2) Simple Joys by Carter's$16.394.8★22,2951%▼falling 13 ![Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Birds/Fruit/Lemon/Turtle 18 Months](https://m.media-amazon.com/images/I/41SlIbRsiBL.jpg) [**Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Birds/Fruit/Lemon/Turtle 18 Months**](https://www.amazon.com/dp/B08QW53P27) Simple Joys by Carter's$18.704.8★69,9561%▲rising 14 ![Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Ditsy Floral/Floral/Polka Dot/Tropical 18 Months](https://m.media-amazon.com/images/I/41zIV2I7yXL.jpg) [**Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Ditsy Floral/Floral/Polka Dot/Tropical 18 Months**](https://www.amazon.com/dp/B08XW9QBBJ) Simple Joys by Carter's$19.194.8★69,9561%—flat 15 ![Amazon Essentials Unisex Toddlers Baby Unisex 6-Pack Sleeveless Bodysuits Blue/Dogs 18 Months](https://m.media-amazon.com/images/I/41YlpQL1nwL.jpg) [**Amazon Essentials Unisex Toddlers Baby Unisex 6-Pack Sleeveless Bodysuits Blue/Dogs 18 Months**](https://www.amazon.com/dp/B0DNJSVVM5) Amazon Essentials$15.384.8★5,1391%▲rising **~~Showing 15 of 181 — show all ~~** ## **Product shelf** All 181 tracked products in this niche. Top sellersNewestTrending [![Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 18 Months](https://m.media-amazon.com/images/I/31rGj5-Ao5L.jpg)**Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 18 Months** Gerber**$16.62**4.8★56,105 reviews](https://www.amazon.com/dp/B07GFPRG5K) [![Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 12 Months](https://m.media-amazon.com/images/I/31rGj5-Ao5L.jpg)**Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 12 Months** Gerber**$16.81**4.8★56,105 reviews](https://www.amazon.com/dp/B07GG1P87H) [![Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 18 Months](https://m.media-amazon.com/images/I/41hhnzWyrHL.jpg)**Simple Joys by Carters Baby Girls Short-Sleeve Bodysuit Pack of 6 Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 18 Months** Simple Joys by Carter's**$18.07**4.8★69,956 reviews](https://www.amazon.com/dp/B073X1WHZD) [![Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Golden Floral 12 Months US](https://m.media-amazon.com/images/I/41LWiwOAgYL.jpg)**Gerber Baby Girls 8-pack Short Sleeve Onesies Bodysuits Shirt Golden Floral 12 Months US** Gerber**$24.42**4.8★31,228 reviews](https://www.amazon.com/dp/B0B6H161PL) [![Amazon Essentials Baby Girls Short Sleeve Bodysuit Dress Everyday Dresses Pack of 3 Pink/Apples 18 Months](https://m.media-amazon.com/images/I/41KAL-EIyBL.jpg)**Amazon Essentials Baby Girls Short Sleeve Bodysuit Dress Everyday Dresses Pack of 3 Pink/Apples 18 Months** Amazon Essentials**$22.73**4.8★2,442 reviews](https://www.amazon.com/dp/B0DNFTB3GM) [![Simple Joys by Carters Baby Girls 6-Pack Short-Sleeve Bodysuit Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 12 Months](https://m.media-amazon.com/images/I/41hhnzWyrHL.jpg)**Simple Joys by Carters Baby Girls 6-Pack Short-Sleeve Bodysuit Multicolor/Dinosaur/Floral/Forest Animals/Fruit/Hearts 12 Months** Simple Joys by Carter's**$14.94**4.8★69,956 reviews](https://www.amazon.com/dp/B073X31WP5) [![Onesies Brand Baby Boys 8-Pack Short Sleeve Mix & Match Bodysuits and Toddler T-Shirt Set Truck 12 Months US](https://m.media-amazon.com/images/I/51262xsRdCL.jpg)**Onesies Brand Baby Boys 8-Pack Short Sleeve Mix & Match Bodysuits and Toddler T-Shirt Set Truck 12 Months US** Onesies Brand**$24.32**4.8★13,053 reviews](https://www.amazon.com/dp/B0B6ZBBBMH) [![Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 6 Animal/Stripe/Geo Tile 18 Months](https://m.media-amazon.com/images/I/41demgaFkjL.jpg)**Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 6 Animal/Stripe/Geo Tile 18 Months** Simple Joys by Carter's**$19.18**4.9★10,631 reviews](https://www.amazon.com/dp/B09M8X29Y1) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Size-Overall**19% *“Fit right on my baby”* **Quality-Overall**16% *“Excellent product line”* **Soft Feel**10% *“The material is soft”* **Comfort-Overall**6% *“Nice and comfortable”* **Material Quality**5% *“comfortable material”* **Color**5% *“Colors are beautiful”* **Value For Money**4% *“Good buy for the money”* **Advertised Vs Actual Product**3% *“As advertised”* **Warmth**3% *“Overall material is warm”* **Durability**2% *“Soft and durable”* ### **What buyers complain about ** **Size-Overall**23% *“Does not fit well”* **Material Quality**8% *“Material really bad and very tight”* **Quality-Overall**7% *“Low quality”* **Zipper Quality**6% *“not 2-way zipper”* **Thickness**4% *“not meant for chunky babies”* **Durability**4% *“not durable”* **Color**3% *“The colors are very pale”* **Advertised Vs Actual Product**3% *“Misleading and itchy”* **Shrinkage Resistance**2% *“Shrinks the more u wash them”* **Stretchability/Expandability/Elasticity**2% *“if you can call it that- it wasnt stretchy”* #### **Top return reasons**- Size-Overall58% - Length13% - Material Quality5% - Value For Money3% - Advertised Vs Actual Product2% - Thin2% - Zipper Quality2% - Sleeve Fit2% - Thigh Fit1% - Color1%