corner rounder
Skip itPrices mostly outside the sweet spot ($5.97–$14.92) — this niche doesn't clear our bar today.
Returns
Great1.5%return rate — above 6% kills the launch gate
Conversion
Great8.1%search→purchase rate — share of searches ending in a sale
Market size
Good$556K$556K/yr · 764K searches
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay80%top-5 brand share — brands hold most of the demand
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Avg price
Okay$9.00avg listing price — sweet spot $15–$100
Review moat
Bad5,237.6avg incumbent reviews — the moat a new listing must climb
Growth
Bad-8.1%90-day search growth — must beat 0% to launch
Price range
Bad$5.97–$14.92cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
12 rising
Sellers
30
Top-5 brand share
80%
Open market
15%
- QIQQIKIN48%
- SUN-STAR15%
- acDesign6%
- MECHEER6%
- TONOS5%
- MYARTOOL5%
- Open — no brand owns it (6 brands, 15%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
QIQQIKIN Paper Corner Rounder 3 in 1 R4mm+R7mm+R10mm Punches for Crafts Cutter Envelope Punch Board Hole Puncher Laminate DIY Projects Photo Cutter Card Making Scrapbooking and Journaling
QIQQIKIN$7.694.4★11,589 rev
New Sunstar Kadomaru Pro Corner Cutter (S4765036) (Kadomaru Pro) with Authentic Hologram US UK EU Only
SUN-STAR$14.154.7★23,445 rev
2PCS Paper Corner Rounder Corner Punch 3 in 1 (R4/R7/R10mm) Corner Cutter for Card Making Laminate Cardstock Scrapbooking and Paper Crafts Business Cards
acDesign$9.854.4★109 rev
Paper Corner Rounder Punch Corner Punch Corner Cutter Rounder for Cardstock 3 in 1 (R4mm R7mm R10mm) Round Corners Cutter for Crafts Card Making Scrapbook Supplies
MECHEER$5.974.2★605 rev
Corner Rounder Punch Corner Cutter and Paper Punches for Crafting Rounded Corner Punch for Journaling & Scrapbook Supplies Card Making Paper Crafts Laminate Cardstock DIY (Round Corner)
TONOS$6.044.1★78 rev
Newest
by launch date
QIQQIKIN Corner Rounder Punch Pink Paper Punches for Crafting Cardstock Edge Cutter Scrapbook Card Making Supplies Journaling Accessories Photos Cards Scrapbooking
QIQQIKIN$8.8211,589 rev
HAUSTGO 3 in 1 Corner Punch 4mm 7mm 10mm 3 Way Corner Rounder Punch for Laminated Cardstock Bullet Journal Invitations Gift Tags Photocards Business Cards and Scrapbooking
HAUSTGO$7.94129 rev
2PCS Paper Corner Rounder Corner Punch 3 in 1 (R4/R7/R10mm) Corner Cutter for Card Making Laminate Cardstock Scrapbooking and Paper Crafts Business Cards
acDesign$9.85109 rev
Corner Rounder Punch Corner Cutter and Paper Punches for Crafting Rounded Corner Punch for Journaling & Scrapbook Supplies Card Making Paper Crafts Laminate Cardstock DIY (Round Corner)
TONOS$6.0478 rev
Paper Corner Rounder Punch Corner Punch Corner Cutter Rounder for Cardstock 3 in 1 (R4mm R7mm R10mm) Round Corners Cutter for Crafts Card Making Scrapbook Supplies
MECHEER$5.97605 rev
Trending
90-day click momentumCorner Rounder Punch Corner Cutter and Paper Punches for Crafting Rounded Corner Punch for Journaling & Scrapbook Supplies Card Making Paper Crafts Laminate Cardstock DIY (Round Corner)
TONOS$6.044.1★
2PCS Paper Corner Rounder Corner Punch 3 in 1 (R4/R7/R10mm) Corner Cutter for Card Making Laminate Cardstock Scrapbooking and Paper Crafts Business Cards
acDesign$9.854.4★
QIQQIKIN Corner Rounder Punch Pink Paper Punches for Crafting Cardstock Edge Cutter Scrapbook Card Making Supplies Journaling Accessories Photos Cards Scrapbooking
QIQQIKIN$8.824.4★
HAUSTGO 3 in 1 Corner Punch 4mm 7mm 10mm 3 Way Corner Rounder Punch for Laminated Cardstock Bullet Journal Invitations Gift Tags Photocards Business Cards and Scrapbooking
HAUSTGO$7.944.4★
QIQQIKIN Corner Cutter 3 in 1 (R5+10MM+Scallop) Edge Rounder Punch Paper Corner Punches for Paper Crafts Picture Photo Clipper Laminating Scrapbook Chomper Business Card Making Junk Journal Supplies
QIQQIKIN$8.824.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -8.1% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 1.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to Use”
“Good quality”
“regular paper fairly well”
“Good value for price”
“cuts nicely -- several options”
“Exactly as advertised”
“The blades are very sharp”
“Works sufficiently”
“The three size options are very useful”
“hasnt broke”
What buyers complain about
“Terrible cuts”
“Did not work”
“It ruins your paper”
“Bad quality”
“Not the sharpest”
“Broke with first use”
“Terrible very few corners of paper fit back into it to make the shapes worthless to me”
“Difficult to use”
“often jams”
“Cheap not worth it”