0.1 mm pen
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.7%return rate — above 6% kills the launch gate
Conversion
Great10.7%search→purchase rate — share of searches ending in a sale
Avg price
Good$12.28avg listing price — sweet spot $15–$100
Price range
Okay$5.54–$19.53cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Review moat
Bad8,414.6avg incumbent reviews — the moat a new listing must climb
Competition
Bad80%top-5 click share — a locked-up shelf
Market size
Bad$55K$55K/yr · 42K searches
Growth
Bad-21.6%90-day search growth — must beat 0% to launch
Brand share
Bad100%top-5 brand share — brand-locked demand
Competition
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.Brands
2 falling
Sellers
23
Top-5 brand share
100%
Open market
0%
- SAKURA77%
- CHARSOCO23%
- Open — no brand owns it (0%)
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 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SAKURA Pigma Micron Fineliner Pens 01 Tip Size Archival Black Ink 6 PK 50035
SAKURA$14.134.8★12,739 rev
CHARSOCO 01 Micro Pen 6 Pack Black Fine Point Pen with Waterproof Archival Ink 0.25mm Fineliner Ink Pens for Artist Illustration Sketching Anime Manga Technical Drawing and Scrapbooking
CHARSOCO$9.444.3★574 rev
SAKURA 30063 6-Piece Pigma Micron Assorted Colors 01 Ink Pen Set
SAKURA$12.364.7★4,149 rev
Sakura 3 Piece Zentangle Tool Set
SAKURA$6.694.7★637 rev
SAKURA Pigma Micron Fineliner Pens - Archival Black Ink Pens - Pens for Writing Drawing or Journaling - Assorted Point Sizes - 6 Pack
SAKURA$12.064.8★64,887 rev
Newest
by launch date
SAKURA Pigma Micron Fineliner Pens - Color Pen Set for Drawing Illustration & Journaling - Waterproof Fade-Resistant & Bleed-Free - Archival Colored Ink - 01 Tip - Assorted Colors - 8 Count
SAKURA$19.53161 rev
CHARSOCO 01 Micro Pen 6 Pack Black Fine Point Pen with Waterproof Archival Ink 0.25mm Fineliner Ink Pens for Artist Illustration Sketching Anime Manga Technical Drawing and Scrapbooking
CHARSOCO$9.44574 rev
CHARSOCO 01 Micro Pen Fine Point Pen with 12 Colors Waterproof Archival Ink 0.25mm Fineliner Ink Pens for Artist Illustration Sketching Anime Manga Technical Drawing and Scrapbooking
CHARSOCO$16.72521 rev
Sakura Pigma Micron Pen 01 Blk 3pc
SAKURA$9.9169 rev
Sakura 50150 Micron Pen 01-0.25mm Tip Black Ink Box of 12 Pens
SAKURA$16.40379 rev
Trending
90-day click momentum
Pigma Micron Pen 01 .25Mm Open Stock-Sepia
SAKURA$5.544.5★
CHARSOCO 01 Micro Pen Fine Point Pen with 12 Colors Waterproof Archival Ink 0.25mm Fineliner Ink Pens for Artist Illustration Sketching Anime Manga Technical Drawing and Scrapbooking
CHARSOCO$16.724.1★
SAKURA 30063 6-Piece Pigma Micron Assorted Colors 01 Ink Pen Set
SAKURA$12.364.7★
SAKURA Pigma Micron Fineliner Pens - Archival Black Ink Pens - Pens for Writing Drawing or Journaling - Assorted Point Sizes - 6 Pack
SAKURA$12.064.8★
SAKURA Pigma Micron Fineliner Pens 01 Tip Size Archival Black Ink 6 PK 50035
SAKURA$14.134.8★
Demand & seasonality
Weekly Amazon search volume, last 98 weeks — -21.6% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 1.7×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent quality”
“Good price”
“As advertised”
“Colors are nice”
“Great pens for drawing, writing and making cards”
“are the perfect size”
“Easy to use”
“Waterproof”
“No problems, long lasting, durable”
“I like the design”
What buyers complain about
“Some pens dry”
“With little drawing I've done several of the pens don't work anymore”
“Dried up”
“Didn't last”
“Low Quality”
“The pens are advertised as bleed-free and quick drying, but that was not my experience”
“not satisfying to write with, not reliable”
“in a minute or so it dries up”
“Several of the colors were dried up”
“Of the 12 pens received only 3 had viable ink”