Is window pens profitable to sell on Amazon United Kingdom?

The niche generates £101K/yr across 24 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -12.3%. Flapen's verdict: Skip it (45/100).

How competitive is the window pens niche?

17 brands and 22 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in window pens?

Top complaints mined from reviews: Functionality-Overall, Color, Drying Time. The return rate is 0.4%.

When does demand for window pens peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 14.7× the quietest.

What does it cost to enter the window pens niche?

Listings span £3.38–£19.61; the average listing price is £8.23 (sweet spot $15–$100). The average incumbent carries 7,112 reviews — the moat a new listing must climb.

window pens

Skip it

Soft demand (-12.3% this quarter) — this niche doesn't clear our bar today.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Conversion

Great7.8%

search→purchase rate — share of searches ending in a sale

Brand share

Good71%

top-5 brand share — brands hold most of the demand

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay58%

top-5 click share — leaders hold, buyers still browse

Price range

Okay£3.38–£19.61

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Okay£101K

£101K/yr · 158K searches

Review moat

Bad7,112.33

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£8.23

avg listing price — sweet spot $15–$100

Growth

Bad-12.3%

90-day search growth — must beat 0% to launch

Signals No Dominant Brand

According to Flapen's Amazon United Kingdom niche tracking, window pens is a £101K/yr Amazon United Kingdom market (158K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 45/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

window pens market data

Units sold / yr: 13K–15K; avg 250–500/product
Revenue / yr: £103K–£123K; units × avg price
Conversion rate: 7.8%
Avg BSR: #71
Page quality: 0%
Prime: 96%
Sponsored: 96%
Out of stock: 8.7%
Avg brand age: 44 months
Avg seller age: 176 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

58%

Top 20: 97%

Open market

23%

VILMA18%
STATIONERY ISLAND17%
Thboxes13%
Chalkola13%
Chalky Crown12%
WINSONS6%

Demand & seasonality

Weekly Amazon search volume, last 99 weeks — -12.3% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 14.7×

Open Trend

Top window pens search terms

window pens37K/yr -9.5%7.2% conv.
glass markers8K/yr -1.5%2.4% conv.
chalk pens for windows and glass22K/yr -9.8%9.7% conv.
mirror pens5K/yr +32.9%6.1% conv.
window pens for glass washable27K/yr -19.1%8.1% conv.
window markers10K/yr -27.2%5.9% conv.
glass pens wipeable5K/yr -4.6%8.5% conv.
glass marker pens3K/yr -2.9%5.9% conv.
window markers for glass washable6K/yr -29.6%9.4% conv.
window paint pens10K/yr -48.8%7.5% conv.

All search terms

Top window pens 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

VILMA Liquid Chalk Markers Window Marker for Cars Glass pens Wet Erase Marker Washable Blackboard Pen for Car Window Mirrors Signs Crafts 2MM Tip 12 Pack 12 Colors

VILMA£6.204.5★723 rev

Thboxes Liquid Chalk Pens 12 Colours 6 mm Wipeable Markers

Thboxes£7.094.5★135 rev

Liquid Chalk Pens - Dry Erase Marker Pens - Chalk Pens for Chalkboards Signs Windows Blackboard Glass Reversible Tip (8 Pack) (Multicolored 6mm)

Chalky Crown£7.284.4★44,007 rev

STATIONERY ISLAND Chalk Pens for blackboard Liquid Chalk Markers for Chalkboard and Glass Wipeable Chalk pens for Window Drawing 10 Colours

STATIONERY ISLAND£6.064.5★8,329 rev

STATIONERY ISLAND Chalk Pens for Blackboard Liquid Chalk Markers for Chalkboard Glass Window Drawing 3mm 8 Colours

STATIONERY ISLAND£5.384.4★12,859 rev

Newest

by launch date

Chalkola 20 Liquid Chalk Pens for Blackboard Chalkboards Window Car

Chalkola£15.124,193 rev

9mo ago

Hueritfly White Liquid Chalk pens - 6 Pack Non-Toxic & Dust-Free Chalk Pens for Windows and Glass Blackboards Whiteboards Bright Colors Markers for Back to School

Hueritfly£7.2974 rev

10mo ago

Lenski Liquid Chalk Pens 10 Colour Liquid Chalk Markers Gifts for Kids 10mm Chalk Pens for Blackboards Window Glass Chalkboards Reversible Tip Girls Birthday Presents

Lenski£11.12297 rev

11mo ago

WINSONS Chalk Pens 16 Colours Non-Toxic Eraserble Markers 6mm Round Tip

WINSONS£9.47310 rev

1y ago

Thboxes Liquid Chalk Pens 12 Colours 6 mm Wipeable Markers

Thboxes£7.09135 rev

1y ago

What buyers say about window pens

What buyers praise and complain about, mined from review topics.

What buyers love

Color23%

“The colours are vibrant”

Quality-Overall16%

“These are excellent pens”

Value For Money10%

“Good value”

Ease Of Use8%

“are easy to handle”

Advertised Vs Actual Product6%

“They did the job”

Pen/Pencil Quality6%

“Lovely vibrant pens”

Ease Of Cleaning5%

“easy to clean off”

Writing Experience3%

“very clear for writing”

Drawing Experience2%

“as these pens draw so smoothly”

Efficiency2%

“Worked well”

What buyers complain about

Functionality-Overall10%

“Takes time to get them working”

Color9%

“Lack of colour”

Drying Time6%

“Dry out too quickly”

Leak-Proof5%

“leak”

Quality-Overall5%

“Cheap”

Nib/Tip Quality5%

“Found it difficult to keep the flow of the chalk in the tip”

Durability4%

“a couple of the ones broke instantly”

Stain Resistance4%

“Stained my blackboard”

Erasability4%

“they are definitely NOT easily erasable”

Moist/Dry3%

“a few had dried out”

Top return reasons

Functionality-Overall23%

Color11%

Quality-Overall6%

Size-Overall5%

Writing Experience5%

Gifting Purpose4%

Nib/Tip Quality4%

Value For Money3%

Advertised Vs Actual Product3%

Product Condition3%

Common questions

Is window pens profitable to sell on Amazon United Kingdom?: The niche generates £101K/yr across 24 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -12.3%. Flapen's verdict: Skip it (45/100).
How competitive is the window pens niche?: 17 brands and 22 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in window pens?: Top complaints mined from reviews: Functionality-Overall, Color, Drying Time. The return rate is 0.4%.
When does demand for window pens peak?: Demand peaks in Oct–Nov–Dec; the busiest month runs 14.7× the quietest.
What does it cost to enter the window pens niche?: Listings span £3.38–£19.61; the average listing price is £8.23 (sweet spot $15–$100). The average incumbent carries 7,112 reviews — the moat a new listing must climb.