sinew
Worth a lookShows low returns (1.1%), but a small market ($105K/yr) keeps it on the watch list.
Returns
Great1.1%return rate — above 5% kills the launch gate
Conversion
Great8.6%search→purchase rate — share of searches ending in a sale
Review moat
Good1,030.76avg incumbent reviews — the moat a new listing must climb
Avg price
Good$12.97avg listing price — sweet spot $15–$100
Growth
Good+29.1%90-day search growth — must beat 0% to launch
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Price range
Okay$7.07–$18.59cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$105K$105K/yr · 94K searches
According to Flapen's Amazon United States niche tracking, sinew is a $105K/yr Amazon United States market (94K searches/yr). The top 5 brands hold 87% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 6, 2026 · scored weekly · How we score niches
sinew market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- $78K–$104K
- units × avg price
- Conversion rate
- 8.6%
- Avg BSR
- #255
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 81%
- Out of stock
- 2.6%
- Avg brand age
- 59 months
- Avg seller age
- 182 days
Competition & brand share
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.Brands
10 falling
Sellers
18
Top-5 brand share
87%
Top 20: 100%
Top-5 click share
60%
Top 20: 99%
Open market
9%
- Kulay32%
- Mandala Crafts21%
- BUTUZE14%
- TREASURE GURUS, LLC13%
- Wavwavw5%
- Gudebrod4%
- Open — no brand owns it (4 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 109 weeks — +29.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top sinew search terms
- sinew37K/yr
- artificial sinew20K/yr
- sinew for tie dye13K/yr
- sinew thread waxed11K/yr
- artificial sinew waxed6K/yr
- sinew thread5K/yr
- sinue thread3K/yr
Top sinew products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kulay Artificial Deer Sinew Natural Waxed Flat Polyester Thread for Beading Leather Tie-dye Crafts and Sewing Sinue (Natural KulayNatural01)
Kulay$16.954.7★805 rev
Treasure Gurus Artificial Deer Sinew Waxed Beading Craft Poly Thread Spool Natural Wax Sinue
TREASURE GURUS, LLC$17.414.7★3,036 rev
Mandala Crafts Brown Artificial Sinew Thread for Basket Weaving
Mandala Crafts$10.004.5★162 rev
284Yards Leather Sewing Waxed Thread 0.8mm Waxed Thread for Bookbinding
BUTUZE$7.074.6★5,205 rev
284Yards Leather Sewing Thread Waxed Waxed Polyester Cord Wax String
BUTUZE$7.354.6★5,205 rev
Newest
by launch date
Wavwavw 2 Pcs Tie Dye Tool 1 Sinew Puller Tool for Tie Dye with Winding Sinew Pulling Device for DIY and 295 Yard White Waxed Thread Kits for Adults (Orange Thread)
Wavwavw$18.4247 rev
SSKKBX Tie-Dye Tool Kit with Sinew Puller Waxed Thread & Rubber Bands
SSKKBX$13.896 rev
Mandala Crafts Natural Artificial Sinew Thread for Basket Weaving
Mandala Crafts$9.97162 rev
Mandala Crafts Beige Artificial Sinew Thread for Basket Weaving
Mandala Crafts$10.00162 rev
Mandala Crafts Dark Tan Artificial Sinew Thread for Basket Weaving
Mandala Crafts$9.89162 rev
Trending
90-day click momentumMandala Crafts Dark Tan Artificial Sinew Thread for Basket Weaving
Mandala Crafts$9.894.5★
Gudebrod Sinew 4oz 450ft (150yd) Neon Yellow 5ply 70lb Test Made in USA Artificial Sinew
Gudebrod$13.624.6★
Gudebrod Sinew 4oz 450ft (150yd) Hot Pink 5ply 70lb Test Made in USA Artificial Sinew
Gudebrod$13.904.6★
Mandala Crafts Beige Artificial Sinew Thread for Basket Weaving
Mandala Crafts$10.004.5★
Mandala Crafts Natural Artificial Sinew Thread for Basket Weaving
Mandala Crafts$9.974.5★
What buyers say about sinew
What buyers praise and complain about, mined from review topics.What buyers love
“Good product, it worked as advertised”
“Happy with leather kit”
“Great Value”
“Exactly as described”
“Sturdy and smooth sinew puller”
“Quite handy”
“Its a good sewing kit”
“Durable and Quality”
“Repair”
“effective”
What buyers complain about
“Both upholstery needles broke”
“A new level of cheap”
“The roll I had from the 70's was thicker”
“Very disappointed in the tools used for stitch”
“I did not use the thread because it was described as off-white”
“the string did not stick like ones I have used in the past”
“Much smaller than I imagined”
“Pretty difficult to use”
“It did smell really gross though”
“It makes a waxy mess”
Top return reasons
Common questions
- Is sinew profitable to sell on Amazon United States?
- The niche generates $105K/yr across 21 tracked products. 90-day search growth is +29.1%. Flapen's verdict: Worth a look (51/100).
- How competitive is the sinew niche?
- 10 brands and 18 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in sinew?
- Top complaints mined from reviews: Durability, Quality-Overall, Thickness. The return rate is 1.1%.
- When does demand for sinew peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the sinew niche?
- Listings span $7.07–$18.59; the average listing price is $12.97 (sweet spot $15–$100). The average incumbent carries 1,031 reviews — the moat a new listing must climb.