Muji Pens
FailPrices span $5.02–$14.14, mostly outside the sweet spot, so Muji Pens is a Fail.
- Flapen Score
- 36 / 100Ranks 689 of 835 Stationery & Office Supplies niches · −11 vs the category median of 4736
- Market size
- £68K/yr246K searches / yr
- 90-day growth
- -5.8%search demand this quarter
- Competition
- 64%top-5 click share · 7 brands · 63 sellers
Flapen Score
Muji Pens against its category
The dotted line is the Stationery & Office Supplies average. Past it, Muji Pens is stronger. Inside it, weaker.
Market
The Muji Pens market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Muji Pens 246K times last year and spent an estimated £68K. The top 5 brands take 93% of clicks. Demand peaks in Apr–Sep. Flapen scores it 36 out of 100, a Fail.
01 · Demand
An estimated 2.8% of those searches ended in a purchase.
Shoppers searched for this 246K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 2.8% of those searches ended in a purchase. Searches in the last 90 days moved -5.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated £68K a year.
- Searches, last 12 months
- 246K
- Growth, 90 days vs prior 90
- -5.8%
- Conversion, latest week
- 2.8%
- Market size, estimated
- £68Ka year
- Peak month
- April4.3× the quietest month
- Top search term
- muji pens104K searches a year
02 · Price
A sale here is worth £10.01.
Listings sell for £10.01 on average, from £5.02 to £14.14. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 250 to 500 of them. At £10.01 that is £3K to £5K a year per listing.
- Average price
- £10.01under the $15 to $100 sweet spot
- Price range
- £5.02–£14.14
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £3K–£5K
- Returns
- 0.4%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
81% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 2.6% of listings are out of stock. The average listing ranks #303 within Pens, Pencils & Writing Supplies. It carries 855 reviews at 4.43 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 81%
- Prime listings
- 94%
- Out of stock, average day
- 2.6%
- Average rank
- #303in Pens, Pencils & Writing Supplies
- Average rating
- 4.43 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 855per listing
- Listings tracked
- 16
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 45 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 45 months
Products
Top Muji Pens products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 29, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size Black
- Price
- £14.14
- Rating
- 4.6/5
- Reviews
- 1,450
- Age
- 7y ago

MUJI 0.38mm Black Gel Ink Pen (Pack of 5)
- Price
- £10.66
- Rating
- 4.6/5
- Reviews
- 781
- Age
- 12y ago

ABEIER Premium 12 Gel Ink Pens Fine Point Pens Ballpoint Pen 0.5mm for Japanese Office Stationery Supply Pack for XSG
- Price
- £7.72
- Rating
- 4.6/5
- Reviews
- 2,345
- Age
- 5y ago

MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
- Price
- £13.40
- Rating
- 4.5/5
- Reviews
- 1,278
- Age
- 5y ago

Muji Gel Ink Pen Black 0.5mm Pack of 3 (Japan Import)
- Price
- £9.12
- Rating
- 4.6/5
- Reviews
- 2,937
- Age
- 8y ago
Trending
estimated 90-day click momentum
Shezi & co Muujiii Pens 0.38mm Black Gel Pen Pack of 10 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes (0.38mm Pack of 10)
- Price
- £9.32
- Rating
- 4.3/5
- Reviews
- 5
- Age
- 12y ago

Muujiii Pens 0.5mm Black Gel Pen Pack of 10 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes | Smudge-Free Ink
- Price
- £10.78
- Rating
- 3.8/5
- Reviews
- 6
- Age
- 12y ago

Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size Black
- Price
- £14.14
- Rating
- 4.6/5
- Reviews
- 1,450
- Age
- 7y ago

MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
- Price
- £13.40
- Rating
- 4.5/5
- Reviews
- 1,278
- Age
- 5y ago

Muji Pens 0.38mm Black Gel Pen Pack of 5 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes | Smudge-Free Ink
- Price
- £8.03
- Rating
- 4.4/5
- Reviews
- 11
- Age
- 12y ago
Newest
by launch date
Surcotto Gel Ink Pens 12pcs 0.5mm Black Ultra-Fast Drying for Writing Drawing and Outlining - Suitable for Students and Office Workers
- Price
- £5.02
- Rating
- 4.4/5
- Reviews
- 2,204
- Age
- 3y ago

Muji Gel Ink Ballpoint Pen Cap Type 10-Pieces Set 0.38 mm Nib Size Black
- Price
- £13.75
- Rating
- 4.3/5
- Reviews
- 358
- Age
- 5y ago

MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
- Price
- £13.40
- Rating
- 4.5/5
- Reviews
- 1,278
- Age
- 5y ago

ABEIER 0.35 mm Black Gel Pen Extra-Fine Ballpoint Pen for Office Stationery Supply (12 Pieces)
- Price
- £6.35
- Rating
- 4.6/5
- Reviews
- 536
- Age
- 5y ago

ABEIER Premium 12 Gel Ink Pens Fine Point Pens Ballpoint Pen 0.5mm for Japanese Office Stationery Supply Pack for XSG
- Price
- £7.72
- Rating
- 4.6/5
- Reviews
- 2,345
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 64% of clicks. Leaders hold, but buyers still shop past them.
Brands
7 rising
Sellers
63
Est. top-5 brand share
93%
Top 20: 100%
Est. top-5 click share
64%
Top 20: 100%
Open market
3%
- MUJI55%
- Muji12%
- ABEIER10%
- Hometric8%
- Shezi & co8%
- Generic5%
- Open — no brand owns it (1 brand, 3%)
Demand
Muji Pens search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, Sep · busiest ÷ quietest = 4.3×
Search terms
Top Muji Pens search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- muji pens104K/yr
- muji90K/yr
- muji pens 0.522K/yr
- muji pen17K/yr
- muji stationery5K/yr
- muji gel pens3K/yr
- muji5K/yr
Reviews and returns
What reviews say buyers love and hate about Muji Pens
We read the reviews and the return reasons for every product selling here.
“one pen does not last long”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
21 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Muji Pens questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









