Half Moon Pillow
MaybeProducts sell for $24.39 on average, inside the sweet spot. But shoppers spend an estimated $50K a year here, so Half Moon Pillow is a Maybe.
- Flapen Score
- 52 / 100Top 36% of 14,768 Health & Household niches · +3 vs the category median of 4952
- Market size
- $50K/yr62K searches / yr
- 90-day growth
- +3.6%search demand this quarter
- Competition
- 48%top-5 click share · 23 brands · 26 sellers
Flapen Score
Half Moon Pillow against its category
The dotted line is the Health & Household average. Past it, Half Moon Pillow is stronger. Inside it, weaker.
Market
The Half Moon Pillow market on Amazon at a glance
Shoppers on Amazon United States searched for Half Moon Pillow 62K times last year and spent an estimated $50K. The top 5 brands take 66% of clicks. Demand peaks in May–Jun. Flapen scores it 52 out of 100, a Maybe.
01 · Demand
An estimated 3.3% of those searches ended in a purchase.
Shoppers searched for this 62K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 3.3% of those searches ended in a purchase. Searches in the last 90 days moved +3.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $50K a year.
- Searches, last 12 months
- 62K
- Growth, 90 days vs prior 90
- +3.6%
- Conversion, latest week
- 3.3%
- Market size, estimated
- $50Ka year
- Peak month
- June2.6× the quietest month
- Top search term
- half moon pillow30K searches a year
02 · Price
A sale here is worth $24.39.
Listings sell for $24.39 on average, from $9.32 to $77.63. Amazon reports units sold in ranges. This niche sold 2K to 3K a year. The average listing sells 0 to 100 of them. At $24.39 that is $0 to $2K a year per listing.
- Average price
- $24.39inside the $15 to $100 sweet spot
- Price range
- $9.32–$77.63
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–3K
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$2K
- Returns
- 1.8%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
97% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 2.7% of listings are out of stock. The average listing ranks #102 within Orthopedic Supplies. It carries 2,709 reviews at 4.35 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 97%
- Prime listings
- 100%
- Out of stock, average day
- 2.7%
- Average rank
- #102in Orthopedic Supplies
- Average rating
- 4.35 starsAmazon United States average 4.42 stars
- Average reviews
- 2,709per listing
- Listings tracked
- 31
04 · Newcomers
4 of last year's 5 launches cleared the first-year sales bar.
5 products launched here in the last 12 months. 4 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 54 months on average, so the names here are settling in.
- Launched, last 12 months
- 5
- Successful launches
- 4Amazon's first-year sales bar
- Average brand age
- 54 months
Products
Top Half Moon Pillow products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 14, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Knee Pillow for Back Sleeping | Large Half Moon Bolster Pillow for Legs Under Knee Pillow for Sleeping on Back (20.5x 8x 4.5) Leg Pillow for Ankle and Foot Comfort Machine Washable Cover Grey
- Price
- $20.12
- Rating
- 4.2/5
- Reviews
- 3,137
- Age
- 6y ago

Everlasting Comfort Under Knee Pillow for Back Sleeping - Memory Foam Half Moon Leg Bolster Pillow for Back Pain Thoracic Support
- Price
- $29.22
- Rating
- 4.5/5
- Reviews
- 5,692
- Age
- 7y ago

AllSett Health Large Half Moon Bolster Pillow for Legs Knees Lower Back and Head Lumbar Support Pillow for Bed Sleeping | Semi Roll for Ankle and Foot Comfort - Machine Washable Cover White
- Price
- $19.81
- Rating
- 4.3/5
- Reviews
- 1,183
- Age
- 6y ago

TranquilRelax Knee Pillow for Back Sleeping Memory Foam Half Moon Bolster Pillow for Legs Under Knee Support Ankle & Foot Comfort Orthopedic Pillow for Side Sleepers (Grey 20.4 x 8 x 4.9)
- Price
- $17.63
- Rating
- 4.3/5
- Reviews
- 572
- Age
- 1y ago

5 STARS UNITED Knee Pillow for Back Sleeping Half Moon Bolster Pillow for Legs Under Knee Pillow for Sleeping on Back Memory Foam Leg Pillow for Back Pain White
- Price
- $33.30
- Rating
- 4.4/5
- Reviews
- 7,984
- Age
- 7y ago
Trending
estimated 90-day click momentum
Saloniture Half Round Massage Table Bolster Pillow Pad - 26 x 6 x 3 Inch - Black
- Price
- $22.24
- Rating
- 4.3/5
- Reviews
- 423
- Age
- 5y ago

LVYSHOW Semi Roll Pillow Under Knee Pillow
- Price
- $19.43
- Rating
- 4.4/5
- Reviews
- 57
- Age
- 10mo ago

wxmbdzq Knee Pillow for Back Sleeping Half Moon Bolster Pillow for Under Knee While Sleeping Support Leg & Back Pain Relief (21.5x9x5 Inches)
- Price
- $26.84
- Rating
- 4.5/5
- Reviews
- 93
- Age
- 1y ago

Ruizman Knee Pillow for Back Sleeping - Half Moon Bolster Pillow for Legs - Cooling Under Knee Pillow for Sleeping on Back Leg Support Foot Elevation (Misty Blue)
- Price
- $24.22
- Rating
- 4.3/5
- Reviews
- 255
- Age
- 2y ago

5 STARS UNITED Knee Pillow for Back Sleeping Half Moon Bolster Pillow for Legs Under Knee Pillow for Sleeping on Back Memory Foam Leg Pillow for Back Pain Arctic Gray
- Price
- $35.01
- Rating
- 4.2/5
- Reviews
- 491
- Age
- 2y ago
Newest
by launch date
LVYSHOW Semi Roll Pillow Under Knee Pillow
- Price
- $19.43
- Rating
- 4.4/5
- Reviews
- 57
- Age
- 10mo ago

anzhixiu Half Moon Leg Bolster for Back Sleeping- Adjustable Height Under Knee Pillow for Ankles- Pure Memory Foam Leg Pillow for Sleeping on The Bed- Bubble
- Price
- $25.74
- Rating
- 4.6/5
- Reviews
- 93
- Age
- 11mo ago

SweetSlubr Knee Pillow for Side Sleepers Half Moon Memory Foam Bolster Pillow for Legs Ergonomic Design Wedge Elevation Pillow for Side & Back Sleeping Under Knee Support Foot Ankle Lumbar White
- Price
- $17.71
- Rating
- 4.0/5
- Reviews
- 344
- Age
- 11mo ago

wxmbdzq Knee Pillow for Back Sleeping Half Moon Bolster Pillow for Under Knee While Sleeping Support Leg & Back Pain Relief (21.5x9x5 Inches)
- Price
- $26.84
- Rating
- 4.5/5
- Reviews
- 93
- Age
- 1y ago

Noverlife Half Round Massage Table Bolster Pillow with Strap Handle 17 x 6 x 4 in PU Leather Semi-Round Bolster Pillow for Neck Under Knee Ankles Pain Relief Half Moon Knee Bolster for Massage Table
- Price
- $20.42
- Rating
- 4.3/5
- Reviews
- 296
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 48% of clicks. Leaders hold, but buyers still shop past them.
Brands
23 falling
Sellers
26
Est. top-5 brand share
66%
Top 20: 98%
Est. top-5 click share
48%
Top 20: 89%
Open market
30%
- AllSett Health26%
- 5 STARS UNITED14%
- Everlasting Comfort11%
- TranquilRelax8%
- Saloniture7%
- ForPro Professional Collection5%
Demand
Half Moon Pillow search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: May, Jun · busiest ÷ quietest = 2.6×
Search terms
Top Half Moon Pillow search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- half moon pillow30K/yr
- half moon bolster pillow11K/yr
- half bolster5K/yr
- half moon bolster5K/yr
- half circle pillow4K/yr
- half round pillow4K/yr
- knee roll3K/yr
Reviews and returns
What reviews say buyers love and hate about Half Moon Pillow
We read the reviews and the return reasons for every product selling here.
“hard plastic”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Half Moon Pillow questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









