mailbox letters
Worth a lookShows no brand lock-in (top 5 brands take 48% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Brand share
Great48%top-5 brand share — no brand owns this niche
Returns
Great1.7%return rate — above 5% kills the launch gate
Competition
Great39%top-5 click share — an open shelf
Conversion
Good5.5%search→purchase rate — share of searches ending in a sale
Growth
Good+21.6%90-day search growth — must beat 0% to launch
Quality gap
Good4.5★avg incumbent rating — lower means beatable quality
Review moat
Okay1,849.35avg incumbent reviews — the moat a new listing must climb
Avg price
Okay$9.84avg listing price — sweet spot $15–$100
Price range
Okay$2.32–$21.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad$98K$98K/yr · 181K searches
According to Flapen's Amazon United States niche tracking, mailbox letters is a $98K/yr Amazon United States market (181K searches/yr). The top 5 brands hold 48% of demand. Verdict: Worth a look — 56/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
mailbox letters market data
- Units sold / yr
- 8K–10K
- avg 100–250/product
- Revenue / yr
- $79K–$98K
- units × avg price
- Conversion rate
- 5.5%
- Avg BSR
- #89
- Page quality
- 0%
- Prime
- 81%
- Sponsored
- 95%
- Out of stock
- 3.3%
- Avg brand age
- 38 months
- Avg seller age
- 168 days
Competition & brand share
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.Brands
30 rising
Sellers
43
Top-5 brand share
48%
Top 20: 92%
Top-5 click share
39%
Top 20: 79%
Open market
46%
- olaine16%
- Aeaocvo10%
- Zonon8%
- LESOON8%
- ynhay7%
- Llewyn6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +21.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.6×
Top mailbox letters search terms
- mailbox letters67K/yr
- mailbox letters and numbers for outside29K/yr
- mailbox lettering12K/yr
- mailbox numbers and letters15K/yr
- letters for mailboxes for outside9K/yr
- mail box letters7K/yr
- letters for mailbox8K/yr
- mailbox letters and numbers11K/yr
- mailbox numbers and letters for outside6K/yr
- mailbox letters for outside5K/yr
Top mailbox letters 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
2 inch Self-Adhesive Vinyl Alphabet Letters Numbers Kit Modern Mailbox Numbers Sticker for Mailbox Signs Window Door Cars Trucks Home Business Address Number Name Craft (Pure White)
olaine$6.944.5★1,208 rev
138 Pcs 2 Inch Mailbox Letters and Numbers for Outside Self-Adhesive Vinyl Alphabet Letters Numbers Kit White Letter and Number Stickers Address Number for Mailbox Signs Cars
Aeaocvo$5.994.4★141 rev
LESOON Mailbox Numbers Street Address Reflective Vinyl Decal Personalized House Numbers for Mailbox Custom Apartment Office Stickers - CMN02
LESOON$18.664.5★1,365 rev
YNHAY 480 Pcs Waterproof 3 Vinyl Alphabet & Number Stickers - Self-Adhesive for Mailboxes Windows Doors Signs Vehicles & More Black
ynhay$9.814.5★1,008 rev
132 Pcs 2 Reflective Mailbox Numbers Letters Stickers for Outside Self Adhesive Numbers and Letters for Address Mailbox White Vinyl Waterproof Stick on Address Decals for House Sign Door Cars Home
YINBEI$13.914.7★269 rev
Newest
by launch date
144 Pcs 3 Inch Vinyl Waterproof Letter Stickers 9 Sheets Self-Adhesive Alphabet Number Stickers for Mailbox Signs Window Door Address Number (White 3 Inch)
YEODEESN$7.0652 rev
Reflective Mailbox Numbers For Outside Personalized Address Decals | Custom Mailbox Number Stickers | Waterproof Vinyl Letters And House Number Decals For Mailboxes And Outdoor Address
GuyDoOk$19.89187 rev
AmazingSpark White Mailbox Letter and Number Stickers Vinyl Self Adhesive Street Address Stickers Waterproof Alphabet Number Decals for Modern Mail Boxes Window Door Car Signs(Classic 2 Inch)
AmazingSpark$9.8925 rev
138 Pcs 2 Inch Mailbox Letters and Numbers for Outside Self-Adhesive Vinyl Alphabet Letters Numbers Kit White Letter and Number Stickers Address Number for Mailbox Signs Cars
Aeaocvo$5.99141 rev
1000 Pcs 2 Inch Waterproof Vinyl Mailbox Letter and Number Stickers Black
wavamawa$8.99170 rev
Trending
90-day click momentum144 Pcs 3 Inch Vinyl Waterproof Letter Stickers 9 Sheets Self-Adhesive Alphabet Number Stickers for Mailbox Signs Window Door Address Number (White 3 Inch)
YEODEESN$7.064.5★
50 PCS 2 inch Reflective Adhesive Mailbox Numbers Waterproof Vinyl Number Stickers with Easy-Peel Tabs Includes Squeegee & Masking Tape Strong Self-Adhesive House Numbers Practical Gifts
olaine$8.934.6★
2 Inch Large Vinyl Letter & Number Stickers 10 Sheets of Self-Adhesive Alphabet Mailbox Numbers & Symbols for Bulletin Boards Crafts Windows Doors Classroom & Home Decor White
LAJEBZOM$5.734.5★
1000 Pcs 2 Inch Waterproof Vinyl Mailbox Letter and Number Stickers Black
wavamawa$8.994.6★
Reflective Mailbox Numbers Sticker with Custom Initial Monogram Modern Number Vinyl Mailbox Lettering Decal Self Adhesive Sticker for Signs Door Cars Trucks Home Business Address Number
OLADOT$9.634.4★
What buyers say about mailbox letters
What buyers praise and complain about, mined from review topics.What buyers love
“BEST QUALITY”
“Easy to put on”
“Adhesive is strong”
“Perfect size”
“As Advertised”
“Price is appropriate”
“Easy to install”
“seems very durable”
“Reflective look is clear”
“The look is great”
What buyers complain about
“Adhesive sucks”
“Not durable at all”
“Absolute garbage”
“Which I could have gotten for far less $ any number of places”
“Difficult to peel”
“The directions could be better”
“wrong size”
“Letters are extremely thin”
“Didn't work”
“These are not reflective”
Top return reasons
Common questions
- Is mailbox letters profitable to sell on Amazon United States?
- The niche generates $98K/yr across 43 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +21.6%. Flapen's verdict: Worth a look (56/100).
- How competitive is the mailbox letters niche?
- 30 brands and 43 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 48% of demand.
- What do buyers complain about in mailbox letters?
- Top complaints mined from reviews: Adhesion/Stickiness, Durability, Quality-Overall. The return rate is 1.7%.
- When does demand for mailbox letters peak?
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- What does it cost to enter the mailbox letters niche?
- Listings span $2.32–$21.00; the average listing price is $9.84 (sweet spot $15–$100). The average incumbent carries 1,849 reviews — the moat a new listing must climb.