Is cardboard sleeves profitable to sell on Amazon United States?

The niche generates $54K/yr across 13 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -13.2%. Flapen's verdict: Skip it (43/100).

How competitive is the cardboard sleeves niche?

8 brands and 16 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 91% of demand.

What do buyers complain about in cardboard sleeves?

Top complaints mined from reviews: Thickness, Strength, Value For Money. The return rate is 0.9%.

What does it cost to enter the cardboard sleeves niche?

Listings span $7.94–$53.97; the average listing price is $21.82 (sweet spot $15–$100). The average incumbent carries 362 reviews — the moat a new listing must climb.

cardboard sleeves

Skip it

A small market ($54K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Avg price

Great$21.82

avg listing price — sweet spot $15–$100

Price range

Great$7.94–$53.97

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

Conversion

Great8.7%

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

Review moat

Great361.54

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad74%

top-5 click share — a locked-up shelf

Brand share

Bad91%

top-5 brand share — brand-locked demand

Growth

Bad-13.2%

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

Market size

Bad$54K

$54K/yr · 28K searches

According to Flapen's Amazon United States niche tracking, cardboard sleeves is a $54K/yr Amazon United States market (28K searches/yr). The top 5 brands hold 91% of demand. Verdict: Skip it — 43/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

cardboard sleeves market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $55K–$65K; units × avg price
Conversion rate: 8.7%
Avg BSR: #790
Page quality: 0%
Prime: 100%
Sponsored: 62%
Out of stock: 5.1%
Avg brand age: 38 months
Avg seller age: 172 days

Competition & brand share

The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

74%

Top 20: 100%

Open market

Hobby Armor66%
Serwrsw9%
ChicRosa7%
ANSSDO6%
Cardboard Sleeves4%
VENOAL4%
Open — no brand owns it (2 brands, 5%)

Demand

Weekly Amazon search volume, last 16 weeks — -13.2% search growth over the last 90 days.

Open Trend

Top cardboard sleeves search terms

hobby armor13K/yr -20.1%10.8% conv.
cardboard card protector7K/yr -14.1%5.9% conv.
cardboard sleeves7K/yr +16.1%4.1% conv.
hobby armor card shipping protectors2K/yr -50.9%14.6% conv.

All search terms

Top cardboard sleeves 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 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

100 Pack Trading Card Shipping Protector by Hobby Armor 3.5 x 4.5 with Rounded Corners Vibrant Multi-Color Card Protector to Guard Cards From Dings Premium Lightweight Cardboard Shipping Supplies

Hobby Armor$16.424.8★969 rev

100 Pack Graded Trading Card Shipping Protector by Hobby Armor 4 x 6 with Rounded Corners Vibrant Multi-Color Card Protector to Guard Cards from Dings Premium Cardboard Slab Shipping Supplies

Hobby Armor$19.814.9★296 rev

Serwrsw 3x4.5 Card Protector Sleeves Cardboard 100 Pack White Collectible Trading Sports Card Protective Sleeves for Storage Shipping Shield

Serwrsw$12.983.9★43 rev

120 Cardboard Sleeves Folded Flat Vending 3 x 4.5 Sports Card Folders Mail Shipping Stiffeners Insert

ChicRosa$16.914.4★291 rev

100 Pack Shell Mailer Trading Card Envelopes by Hobby Armor 7 x 4.35 Trading Card Mailers for Shipping Perfect Sized Shipping Envelope for Mailing Semi-Rigid and Toploaders Protector Supplies

Hobby Armor$27.434.8★385 rev

Newest

by launch date

100 Pack Shell Mailer Incognito Trading Card Envelopes by Hobby Armor 7 x 4.35 Trading Card Mailers for Shipping Perfect Size Shipping Envelope for Mailing Cards in Semi-Rigid Holders & Toploaders

Hobby Armor$27.19148 rev

8mo ago

Serwrsw 3x4.5 Card Protector Sleeves Cardboard 100 Pack White Collectible Trading Sports Card Protective Sleeves for Storage Shipping Shield

Serwrsw$12.9843 rev

10mo ago

100 Pack Shell Mailer Trading Card Envelopes by Hobby Armor 7 x 4.35 Trading Card Mailers for Shipping Perfect Sized Shipping Envelope for Mailing Semi-Rigid and Toploaders Protector Supplies

Hobby Armor$27.43385 rev

1y ago

Golden State Art 3.5X4.5 Corrugated Sheet Trading Card Protector 50 Pack

Golden State Art$9.9864 rev

2y ago

Trading Card Shipping Protectors - Premium Ultra Strong Plastic Inserts - 110 Pack - 3.5 x 4.5

Storage Standard$17.03785 rev

3y ago

What buyers say about cardboard sleeves

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

What buyers love

Quality-Overall30%

“great quality, excellent protection”

Value For Money14%

“Worth the price”

Size-Overall8%

“Just the right size”

Ease Of Use7%

“Easy to use”

Advertised Vs Actual Product6%

“As advertised”

Durability6%

“Very durable”

Thickness4%

“thickness is good”

Paper Quality4%

“Very nice mailers well made”

Strength3%

“They are sturdy”

Collectibles3%

“definitely see how theyd be good for mailing collectible cards”

What buyers complain about

Thickness36%

“Too Thick”

Strength15%

“not overly sturdy”

Value For Money6%

“Could be a little cheaper”

Size-Overall6%

“slightly smaller than semi-rigid card sleeves”

Compatibility-Overall4%

“Will not work for a tattoo/sticker vending machine”

Weight Heavy3%

“they are heavier than normal”

Top return reasons

Size-Overall53%

Advertised Vs Actual Product11%

Thickness7%

Thin4%

Strength4%

Value For Money4%

Quality-Overall4%

Defective Material/Parts3%

Material Quality3%

Functionality-Overall2%

Common questions

Is cardboard sleeves profitable to sell on Amazon United States?: The niche generates $54K/yr across 13 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -13.2%. Flapen's verdict: Skip it (43/100).
How competitive is the cardboard sleeves niche?: 8 brands and 16 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 91% of demand.
What do buyers complain about in cardboard sleeves?: Top complaints mined from reviews: Thickness, Strength, Value For Money. The return rate is 0.9%.
What does it cost to enter the cardboard sleeves niche?: Listings span $7.94–$53.97; the average listing price is $21.82 (sweet spot $15–$100). The average incumbent carries 362 reviews — the moat a new listing must climb.