---
title: "18 month long sleeve onesies boy — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/18-month-long-sleeve-onesies-boy"
last_updated: "2026-07-10T00:16:21.456Z"
locale: en
meta:
  description: "a small market ($0/yr) — 18 month long sleeve onesies boy doesn't clear our bar today."
  "og:description": "a small market ($0/yr) — 18 month long sleeve onesies boy doesn't clear our bar today."
  "og:title": "18 month long sleeve onesies boy — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **18 month long sleeve onesies boy**

**Skip it****43/100 **

a small market ($0/yr) — 18 month long sleeve onesies boy doesn't clear our bar today.

**Market/yr**

**$0**

**Growth (1y)**

**+121.0%**

**Products**

**15**

**Brands**

**5**

was 7 a year ago

**Sellers**

**5**

**Price range**

**$13.84–$30.87**

**Returns**

**2.4%**

**Rating**

**4.8★**

**Skip it**

Scored 43/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**0**

 ×0.30

Growth

**67**

 ×0.30

Competition

**64**

 ×0.20

Quality gap

**20**

 ×0.10

Returns

**81**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +121.0% year over year.

1K647Spike '24Spike '25Prime Day '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 15.3×

## **Competition**

- Simple Joys by Carter's53% - Amazon Essentials21% - Gerber18% - Butterblu4% - Hudson Baby4%

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them. 5 brands and 5 sellers compete here.

**Brands**

**5 **▼falling

was 7 a year ago

**Sellers**

**5**

**Top 5 brand share**

**100%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![Simple Joys Baby Girls 5 pack long sleeve original bodysuit Shirt Pink/Navy/Mint 18 Months](https://m.media-amazon.com/images/I/51-yUoOIFPL.jpg) [**Simple Joys Baby Girls 5 pack long sleeve original bodysuit Shirt Pink/Navy/Mint 18 Months**](https://www.amazon.com/dp/B01M2CO9DQ)

Simple Joys by Carter's$16.844.8★44,36311%▼falling

2
![Simple Joys by Carters Baby 4-Pack Long-Sleeve Thermal Bodysuits](https://m.media-amazon.com/images/I/41+HrgTjr1L.jpg) [**Simple Joys by Carters Baby 4-Pack Long-Sleeve Thermal Bodysuits**](https://www.amazon.com/dp/B08XWF9WYH)

Simple Joys by Carter's$14.524.9★9,31111%▲rising

3
![Simple Joys by Carters Baby 5-pack Long-sleeved Bodysuits Blue/Grey 24 Months](https://m.media-amazon.com/images/I/512EMOtPyPL.jpg) [**Simple Joys by Carters Baby 5-pack Long-sleeved Bodysuits Blue/Grey 24 Months**](https://www.amazon.com/dp/B06WD62VZZ)

Simple Joys by Carter's$17.794.8★39,8099%▲rising

4
![Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt solids 18 Months](https://m.media-amazon.com/images/I/41YWNAWGJyL.jpg) [**Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt solids 18 Months**](https://www.amazon.com/dp/B07GKN2SXC)

Simple Joys by Carter's$17.594.8★39,8098%▼falling

5
![Simple Joys by Carters Baby Girls 5-Pack Long-Sleeve Bodysuit Shirt solid 18 Months](https://m.media-amazon.com/images/I/41bC+L1t1lL.jpg) [**Simple Joys by Carters Baby Girls 5-Pack Long-Sleeve Bodysuit Shirt solid 18 Months**](https://www.amazon.com/dp/B07GKNC1ZJ)

Simple Joys by Carter's$17.134.8★44,3637%▼falling

6
![Gerber Baby 6 Pack Long-Sleeve Onesies Bodysuit White and Black 18 Months](https://m.media-amazon.com/images/I/41eH5YGJIBL.jpg) [**Gerber Baby 6 Pack Long-Sleeve Onesies Bodysuit White and Black 18 Months**](https://www.amazon.com/dp/B0C5FZPN23)

Gerber$20.924.7★1,7817%▼falling

7
![Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Dark Green/Sheep/Stripe 18 Months](https://m.media-amazon.com/images/I/41qR0WcBI5L.jpg) [**Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Dark Green/Sheep/Stripe 18 Months**](https://www.amazon.com/dp/B0FFJL8XNS)

Amazon Essentials$14.844.7★4666%▲rising

8
![Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt bears/animals green/stripes 18 Months](https://m.media-amazon.com/images/I/41re+P0I+bL.jpg) [**Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt bears/animals green/stripes 18 Months**](https://www.amazon.com/dp/B0795YBN89)

Simple Joys by Carter's$17.404.8★39,8096%▲rising

9
![Amazon Essentials Disney Unisex Babies Long-Sleeve Bodysuits Pack of 5 Princess Friends 18 Months](https://m.media-amazon.com/images/I/41q82QWeiRL.jpg) [**Amazon Essentials Disney Unisex Babies Long-Sleeve Bodysuits Pack of 5 Princess Friends 18 Months**](https://www.amazon.com/dp/B0F9NFPLNX)

Amazon Essentials$25.194.8★1,5446%▲rising

10

![Gerber Unisex Baby 6 Pack Long-sleeve Onesies Bodysuit And Toddler T-Shirt Set 6-pack White 24 Months US](https://m.media-amazon.com/images/I/31pWrTLj2zL.jpg) [**Gerber Unisex Baby 6 Pack Long-sleeve Onesies Bodysuit And Toddler T-Shirt Set 6-pack White 24 Months US**](https://www.amazon.com/dp/B07GFPRG6D)

Gerber$16.554.8★8,6046%▲rising

11

![Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Ivory/Light Camel/Stripe 12 Months](https://m.media-amazon.com/images/I/41QZXBKKbjL.jpg) [**Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Ivory/Light Camel/Stripe 12 Months**](https://www.amazon.com/dp/B0FFJTHTJC)

Amazon Essentials$13.844.7★4665%▲rising

12

![Gerber Baby Boys 3-pack Or Long-sleeve Onesies Bodysuit And Toddler T-Shirt Set 6-pack White 18 Months US](https://m.media-amazon.com/images/I/31pWrTLj2zL.jpg) [**Gerber Baby Boys 3-pack Or Long-sleeve Onesies Bodysuit And Toddler T-Shirt Set 6-pack White 18 Months US**](https://www.amazon.com/dp/B07GG1RMGB)

Gerber$16.144.8★8,6045%▼falling

13

![Butterblu Blake 5-Pack Long Sleeve Bodysuits 100% Organic Cotton Baby Boys & Girls Frost 18 Months](https://m.media-amazon.com/images/I/41--WLM51sL.jpg) [**Butterblu Blake 5-Pack Long Sleeve Bodysuits 100% Organic Cotton Baby Boys & Girls Frost 18 Months**](https://www.amazon.com/dp/B0FQRH9CRF)

Butterblu$30.874.7★1874%▲rising

14

![Amazon Essentials Unisex Babies Long-Sleeve One-Piece Rashguard Bright Mint Green 12 Months](https://m.media-amazon.com/images/I/31gG15dgG4L.jpg) [**Amazon Essentials Unisex Babies Long-Sleeve One-Piece Rashguard Bright Mint Green 12 Months**](https://www.amazon.com/dp/B0FJS4RXXH)

Amazon Essentials$17.124.4★914%▲rising

15

![Hudson Baby Unisex Baby Cotton Long-Sleeve Bodysuits Cars 5-Pack 12-18 Months](https://m.media-amazon.com/images/I/51icQbQp22S.jpg) [**Hudson Baby Unisex Baby Cotton Long-Sleeve Bodysuits Cars 5-Pack 12-18 Months**](https://www.amazon.com/dp/B097FZWZK1)

Hudson Baby$13.994.8★28,8354%▲rising

## **Product shelf**

All 15 tracked products in this niche.

Top sellersNewestTrending

[![Simple Joys Baby Girls 5 pack long sleeve original bodysuit Shirt Pink/Navy/Mint 18 Months](https://m.media-amazon.com/images/I/51-yUoOIFPL.jpg)**Simple Joys Baby Girls 5 pack long sleeve original bodysuit Shirt Pink/Navy/Mint 18 Months** Simple Joys by Carter's**$16.84**4.8★44,363 reviews](https://www.amazon.com/dp/B01M2CO9DQ) [![Simple Joys by Carters Baby 4-Pack Long-Sleeve Thermal Bodysuits](https://m.media-amazon.com/images/I/41+HrgTjr1L.jpg)**Simple Joys by Carters Baby 4-Pack Long-Sleeve Thermal Bodysuits** Simple Joys by Carter's**$14.52**4.9★9,311 reviews](https://www.amazon.com/dp/B08XWF9WYH) [![Simple Joys by Carters Baby 5-pack Long-sleeved Bodysuits Blue/Grey 24 Months](https://m.media-amazon.com/images/I/512EMOtPyPL.jpg)**Simple Joys by Carters Baby 5-pack Long-sleeved Bodysuits Blue/Grey 24 Months** Simple Joys by Carter's**$17.79**4.8★39,809 reviews](https://www.amazon.com/dp/B06WD62VZZ) [![Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt solids 18 Months](https://m.media-amazon.com/images/I/41YWNAWGJyL.jpg)**Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt solids 18 Months** Simple Joys by Carter's**$17.59**4.8★39,809 reviews](https://www.amazon.com/dp/B07GKN2SXC) [![Simple Joys by Carters Baby Girls 5-Pack Long-Sleeve Bodysuit Shirt solid 18 Months](https://m.media-amazon.com/images/I/41bC+L1t1lL.jpg)**Simple Joys by Carters Baby Girls 5-Pack Long-Sleeve Bodysuit Shirt solid 18 Months** Simple Joys by Carter's**$17.13**4.8★44,363 reviews](https://www.amazon.com/dp/B07GKNC1ZJ) [![Gerber Baby 6 Pack Long-Sleeve Onesies Bodysuit White and Black 18 Months](https://m.media-amazon.com/images/I/41eH5YGJIBL.jpg)**Gerber Baby 6 Pack Long-Sleeve Onesies Bodysuit White and Black 18 Months** Gerber**$20.92**4.7★1,781 reviews](https://www.amazon.com/dp/B0C5FZPN23) [![Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Dark Green/Sheep/Stripe 18 Months](https://m.media-amazon.com/images/I/41qR0WcBI5L.jpg)**Amazon Essentials x Sofia Grainge Unisex Babies Long Sleeve Crew Neck Bodysuit Pack of 3 Dark Green/Sheep/Stripe 18 Months** Amazon Essentials**$14.84**4.7★466 reviews](https://www.amazon.com/dp/B0FFJL8XNS) [![Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt bears/animals green/stripes 18 Months](https://m.media-amazon.com/images/I/41re+P0I+bL.jpg)**Simple Joys by Carters Baby Boys 5-Pack Long-Sleeve Bodysuit Shirt bears/animals green/stripes 18 Months** Simple Joys by Carter's**$17.40**4.8★39,809 reviews](https://www.amazon.com/dp/B0795YBN89)

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**27%

*“fit incredible”*

**Quality-Overall**12%

*“Good quality”*

**Value For Money**10%

*“Worth the money”*

**Gifting Purpose**7%

*“Christmas present”*

**Durability**7%

*“durable”*

**Warmth**6%

*“Great price and quality, on the thinner side so good for warmer weather and breathable”*

**Soft Feel**6%

*“SO SOFT”*

**Breathability**4%

*“Definitely breathable”*

**Material Quality**4%

*“Material is soft, comfortable and value for the money is awesome”*

**Comfort-Overall**4%

*“comfortable”*

### **What buyers complain about **

**Color**33%

*“Color change after wash”*

**Size-Overall**15%

*“RUNS REALLY SMALL”*

**Thickness**8%

*“REALLY THIN MATERIAL”*

**Machine Wash Suitability**8%

*“AFFRAID THEYRE GOING TO RIP IN WASHING MACHINE”*

**Material Quality**8%

*“REALLY THIN MATERIAL”*

**Sleeve Fit**7%

*“the sleeves are already short”*

#### **Top return reasons**- Size-Overall63% - Length10% - Sleeve Fit6% - Material Quality5% - Advertised Vs Actual Product3% - Value For Money2% - Thin2% - Chest Fit1% - Quality-Overall1% - Arm Fit1%