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18 month pajamas

Worth a look57/100

18 month pajamas shows a fragmented shelf (top 5 take 9% of clicks), but a small market ($127K/yr) keeps it on the watch list.

Market/yr

$127K

Growth (1y)

+255.3%

Products

257

Brands

34

was 22 a year ago

Sellers

32

Price range

$9.52–$44.23

Returns

2.9%

Rating

4.6★

57/100

Worth a look

Scored 57/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns
Market size
6
×0.30
Growth
82
×0.30
Competition
100
×0.20
Quality gap
28
×0.10
Returns
76
×0.10

Demand

Weekly Amazon search volume, last 104 weeks — +255.3% year over year.
8K4KPrime Day '24Spike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

Seasonality

Monthly demand index across the year — 1.00 is average.

No pronounced peak months · busiest ÷ quietest = 1.5×

Competition

26%Gerber
  • Gerber26%
  • Simple Joys by Carter's23%
  • Amazon Essentials7%
  • Burt's Bees Baby6%
  • Onesies Brand6%
  • little planet by carter's4%
  • Other (28 brands)29%

Clicks spread well past the top 5 (9% combined) — an open shelf where new products get seen. 34 brands and 32 sellers compete here.

Brands

34 rising

was 22 a year ago

Sellers

32

Top 5 brand share

67%

#ProductBrandPriceRatingReviewsClick shareTrend

Product shelf

All 257 tracked products in this niche.

Reviews

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

What buyers love

Soft Feel15%

“Really soft”

Size-Overall14%

“Fit well”

Quality-Overall11%

“Great quality as usual from Carter”

Comfort-Overall8%

“Very comfortable”

Material Quality4%

“Great Material”

Warmth4%

“Keeps my baby warm”

Sleep Quality3%

“It really helps our baby sleep well”

Value For Money3%

“Good for the price”

Design-Overall3%

“Cute Designs”

Color3%

“Colors are beautiful”

What buyers complain about

Size-Overall21%

“Too big”

Quality-Overall7%

“Poor quality, runs way smaller than everything else from the brand”

Material Quality5%

“The material felt cheap”

Zipper Quality5%

“Broken zipper”

Thickness4%

“These were a lot thinner than I expected”

Stretchability/Expandability/Elasticity3%

“do not stretch”

Arm Fit3%

“Short arms”

Durability3%

“broken after 2 months”

Stitch/Finish/Polish2%

“One set was not sewn properly”

Hard Feel2%

“not super soft”

Top return reasons

  • Size-Overall53%
  • Length11%
  • Material Quality7%
  • Zipper Quality3%
  • Advertised Vs Actual Product3%
  • Thin2%
  • Sleeve Fit2%
  • Value For Money2%
  • Arm Fit2%
  • Thigh Fit1%

Data scraped July 8, 2026 · Marketplace baseline: 4.4★ avg rating · $22.71 median price · 2.2% median returns across 13,812 tracked niches.