Is black string profitable to sell on Amazon United States?

The niche generates $56K/yr across 23 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is +11.2%. Flapen's verdict: Skip it (47/100).

How competitive is the black string niche?

19 brands and 21 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 59% of demand.

What do buyers complain about in black string?

Top complaints mined from reviews: Stretchability/Expandability/Elasticity, Thickness, Quality-Overall. The return rate is 1.4%.

When does demand for black string peak?

Demand peaks in Sep–Oct; the busiest month runs 2.7× the quietest.

What does it cost to enter the black string niche?

Listings span $4.40–$14.03; the average listing price is $7.13 (sweet spot $15–$100). The average incumbent carries 1,864 reviews — the moat a new listing must climb.

black string

Skip it

Prices mostly outside the sweet spot ($4.40–$14.03) — this niche doesn't clear our bar today.

Conversion

Great11.9%

search→purchase rate — share of searches ending in a sale

Returns

Great1.4%

return rate — above 5% kills the launch gate

Brand share

Great59%

top-5 brand share — no brand owns this niche

Competition

Good54%

top-5 click share — leaders hold, buyers still browse

Review moat

Okay1,863.78

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+11.2%

90-day search growth — must beat 0% to launch

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Avg price

Bad$7.13

avg listing price — sweet spot $15–$100

Market size

Bad$56K

$56K/yr · 66K searches

Price range

Bad$4.40–$14.03

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United States niche tracking, black string is a $56K/yr Amazon United States market (66K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 47/100.

Data updated Jul 6, 2026 · scored weekly · How we score niches

black string market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $57K–$71K; units × avg price
Conversion rate: 11.9%
Avg BSR: #63
Page quality: 0%
Prime: 100%
Sponsored: 78%
Out of stock: 0.0%
Avg brand age: 48 months
Avg seller age: 180 days

Competition & brand share

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

Brands

19 rising

Sellers

Top-5 brand share

59%

Top 20: 100%

Top-5 click share

54%

Top 20: 97%

Open market

36%

Ohtomber25%
LUSTEMBER13%
Kblick8%
Anwyll7%
ANMOFLY6%
Joyberg6%

Demand & seasonality

Weekly Amazon search volume, last 95 weeks — +11.2% search growth over the last 90 days.

Peak months: Sep, Oct · busiest ÷ quietest = 2.7×

Open Trend

Top black string 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Ohtomber Black Natural Cotton Craft String 328ft 2MM Bakers Twine

Ohtomber$5.934.7★2,852 rev

LUSTEMBER 0.8mm Nylon String Strong Bracelet String Durable Nylon Cord for Jewelry Making Bracelets Beading Necklaces Rattail Braiding Kumihimo Wind Chimes Blinds and Handicrafts

LUSTEMBER$6.984.7★1,284 rev

Kblick Black Nylon String Cord - 1MM 100 Yards Black Twine Bracelet String for Bracelet Making Braided Ornament Lanyard Thread Jewelry Thread Clay Bead Cords for Crafts Macrame Satin

Kblick$5.574.6★880 rev

Anwyll 1.5MM Black Nylon String - 110Yards Wind Chime String Weather Resistant Nylon Cord Black Nylon Bracelets String Beading Thread Macrame Trim Cord for Necklace Jewelry Making Craft Halloween

Anwyll$6.664.5★634 rev

984 Ft Twine String Natural Jute Twine 2mm White Cotton Rope 10ply Black Cotton for Crafts Art Gardening Plants Gift Wrapping Decoration Packing String Bulk(3 Rolls)

Joyberg$5.944.8★1,849 rev

Newest

by launch date

Vaincre 2PCS 328Ft 2MM Natural Cotton Twine String Black

Vaincre$5.9780 rev

today

PerkDecor Twine String Natural Jute Twine & Cotton Twine Bundle - Bulk Packing Twine for Crafts Gift Wrapping String Gardening Twine Home Decor (3 Rolls 984ft 2mm)

PerkDecor$5.31127 rev

3mo ago

jijAcraft 328Ft Black Cotton String - 2MM Halloween String Cooking Bakers Twine Heavy Duty Packing Twine Craft Strings for Gift Wrapping Macrame Decor

jijAcraft$5.495 rev

5mo ago

KINGLAKE Black Jute Twine String - 2mm 164 Feet Long Black String Hemp Jute Rope Cord Twine for Crafts Gift Wrapping Gift Tags Home Decor Halloween

KINGLAKE$4.40182 rev

5mo ago

TRIBERION Paracord Rope 750 lb - 1000ft / 500ft / 200ft / 100ft 5/32 Parachute Cord 4MM 12-Strand para Cord - Heavy Duty Spool String for Survival Camping Gear Survival Bracelet Clothesline

Triberion$6.76729 rev

10mo ago

What buyers say about black string

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

What buyers love

Quality-Overall19%

“Good variety”

Advertised Vs Actual Product10%

“As described”

Value For Money10%

“Great deal”

Durability9%

“Super durable”

Strength8%

“has good tensile strength”

Color7%

“The colors are simply beautiful”

Stretchability/Expandability/Elasticity6%

“Nice and stretchy”

Ease Of Use5%

“Easy to use”

Efficiency4%

“Works well for Kandi”

Thickness3%

“That said, the thickness of the nylon is perfect for making necklaces or bracelets”

What buyers complain about

Stretchability/Expandability/Elasticity12%

“Not elastic”

Thickness11%

“Not as thick as some photos suggest”

Quality-Overall7%

“Cheap”

Rope/Wire Tangling4%

“This cord wrapped on the cardboard leaves kinks in the cord which usually shows at the end of the lanyards Im tying”

Material Quality4%

“I wanted cotton for necklaces, too rough and weak”

Hard Feel4%

“far too rough”

Size-Overall4%

“small”

Strength3%

“Breaks easy”

Durability3%

“I broke this by pulling on it”

Functionality-Overall3%

“Doesn't work”

Top return reasons

Size-Overall25%

Thin17%

Stretchability/Expandability/Elasticity11%

Advertised Vs Actual Product10%

Thickness8%

Value For Money7%

Functionality-Overall4%

Color4%

Material Quality3%

Quality-Overall3%

Common questions

Is black string profitable to sell on Amazon United States?: The niche generates $56K/yr across 23 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is +11.2%. Flapen's verdict: Skip it (47/100).
How competitive is the black string niche?: 19 brands and 21 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 59% of demand.
What do buyers complain about in black string?: Top complaints mined from reviews: Stretchability/Expandability/Elasticity, Thickness, Quality-Overall. The return rate is 1.4%.
When does demand for black string peak?: Demand peaks in Sep–Oct; the busiest month runs 2.7× the quietest.
What does it cost to enter the black string niche?: Listings span $4.40–$14.03; the average listing price is $7.13 (sweet spot $15–$100). The average incumbent carries 1,864 reviews — the moat a new listing must climb.