book corners
Skip itPrices mostly outside the sweet spot ($3.89–$12.63) — this niche doesn't clear our bar today.
Review moat
Great186.31avg incumbent reviews — the moat a new listing must climb
Brand share
Great55%top-5 brand share — no brand owns this niche
Returns
Good2.0%return rate — above 6% kills the launch gate
Conversion
Good4.3%search→purchase rate — share of searches ending in a sale
Competition
Good53%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Bad-6.7%90-day search growth — must beat 0% to launch
Avg price
Bad$7.36avg listing price — sweet spot $15–$100
Market size
Bad$33K$33K/yr · 104K searches
Price range
Bad$3.89–$12.63cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.Brands
23 falling
Sellers
24
Top-5 brand share
55%
Open market
37%
- CooBigo23%
- CATOSUM8%
- GrliTra8%
- Outus8%
- ValueBargain7%
- Aynaxcol7%
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 26 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
100pcs Metal Book Corner Protectors 4 Assorted Colors Photo Corners Protector for Picture Vintage Photo Covers Decorative Paperbacks Scrapbooking Journal Book Edge Guard Accessories
CooBigo$6.474.8★52 rev
80-Piece Metal Book Corners - Small Iron Corner Protectors for Scrapbook Photo Album Diary Covers - Gold Silver Rose Gold Antique Bronze
CATOSUM$6.964.6★1,153 rev
60PCS Metal Book Corner Protector Bronze Metal Book Corner Vintage Antique Book Scrapbooking Corner Protector for Desk Jewelry Case Box Book Scrapbooking Albums Menus Triangle Carved 15 Styles
GrliTra$8.304.6★150 rev
120Pcs Book Corners Metal Vintage Book Corner Protectors for Crafting Scrapbooking Photo Album Notebook Cover Schoolbook Durable & Stylish
ValueBargain$5.934.4★19 rev
Outus 96 Pcs Metal Book Corners Vintage Iron Book Corner Protectors for Scrapbook Album Photo 24 Styles Decorative Edge Guard for DIY Crafts Notebook
Outus$9.284.6★879 rev
Newest
by launch date
100 PCS Metal Book Corner Protectors Vintage Book Corner Covers Iron Paperback Books Protector Corner Guard Edge Decorative for Scrapbooking Triangle Decorative Diary Cover Menus Folder Album Bronze
FdcZeyxior$3.892 rev
120 Pack Book Corner Protectors Metal Book Corners Scratch-Resistant Books Corners for Hardcovers Notebooks
Thrymme$6.194 rev
HJZHII 240Pcs Metal Book Corner Protectors 6 Colors Vintage Book Corner Protectors for Photo Album Crafting Scrapbooking Notebook Cover Schoolbook
HJZHII$5.581 rev
DERAYEE 100PCS Metal Book Corner Protectors Vintage Decorative Photo Corner Protectors for Scrapbooking Picture Album Diary Cover Paperback Book Notebook Edge Guard Accessories (4 Colors)
DERAYEE$6.286 rev
100pcs Metal Book Corner Protectors 4 Assorted Colors Photo Corners Protector for Picture Vintage Photo Covers Decorative Paperbacks Scrapbooking Journal Book Edge Guard Accessories
CooBigo$6.4752 rev
Trending
90-day click momentum100 PCS Metal Book Corner Protectors Vintage Book Corner Covers Iron Paperback Books Protector Corner Guard Edge Decorative for Scrapbooking Triangle Decorative Diary Cover Menus Folder Album Bronze
FdcZeyxior$3.893.0★
DERAYEE 100PCS Metal Book Corner Protectors Vintage Decorative Photo Corner Protectors for Scrapbooking Picture Album Diary Cover Paperback Book Notebook Edge Guard Accessories (4 Colors)
DERAYEE$6.284.8★
50Pcs Book Corner Protectors 15mm Book Protective Corner Vintage Book Corners Protector Iron Notebook Protection Corners for Notebooks Books Menus Diary Scrapbooking
Luatoxry$7.994.4★
ISDVBUY 80 Pack Retro Book Corner Protectors - Vintage Iron 4 Colors Corner Guards for Scrapbooking Photo Albums Diary Covers & Notebooks
ISDVBUY$4.205.0★
HJZHII 240Pcs Metal Book Corner Protectors 6 Colors Vintage Book Corner Protectors for Photo Album Crafting Scrapbooking Notebook Cover Schoolbook
HJZHII$5.585.0★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.7% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 3.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The quality is good”
“Easy to use”
“Just as advertised”
“Cute decorative pieces”
“They fit great”
“I love the range of colors available”
“Great price”
“These corners are beautiful and there's a good amount of variety in sizes and styles”
“Repeat purchase, these are so pretty and they add a great touch to your journal covers”
“Durable and easy to use”
What buyers complain about
“Both sides are equal size which makes it rather difficult to fit them onto the corners”
“I literally had to super glue them on”
“Bit difficult to use”
“No instructions were included”
“Flimsy”
“do not completely flatten on paperback covers like these will”
“will slip off”
“.but too sharp”
“These are on the cheap side”
“not worth it”