ruler
Worth a lookShows low returns (0.2%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Conversion
Great10.2%search→purchase rate — share of searches ending in a sale
Brand share
Good67%top-5 brand share — brands hold most of the demand
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Review moat
Good1,063.84avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay£255K£255K/yr · 770K searches
Growth
Okay+13.9%90-day search growth — must beat 0% to launch
Avg price
Bad£3.26avg listing price — sweet spot $15–$100
Price range
Bad£1.01–£5.77cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, ruler is a £255K/yr Amazon United Kingdom market (770K searches/yr). The top 5 brands hold 67% of demand. Demand peaks in Aug–Sep. Verdict: Worth a look — 56/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
ruler market data
- Units sold / yr
- 125K–150K
- avg 4,000–5,000/product
- Revenue / yr
- £408K–£489K
- units × avg price
- Conversion rate
- 10.2%
- Avg BSR
- #41
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 74%
- Out of stock
- 4.7%
- Avg brand age
- 36 months
- Avg seller age
- 172 days
Competition & brand share
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
21 rising
Sellers
113
Top-5 brand share
67%
Top 20: 99%
Top-5 click share
47%
Top 20: 86%
Open market
30%
- Helix26%
- Q-Connect23%
- Guagua8%
- Udewo6%
- QincLing5%
- AIOUNIYA4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +13.9% search growth over the last 90 days.Peak months: Aug, Sep · busiest ÷ quietest = 3.4×
Top ruler search terms
- ruler416K/yr
- ruler 30cm106K/yr
- 30cm ruler80K/yr
- rulers57K/yr
- 30 cm ruler19K/yr
- long ruler15K/yr
- rulers 30cm8K/yr
- clear ruler8K/yr
- plastic ruler8K/yr
- ruller7K/yr
Top ruler 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
Q-Connect Ruler Shatterproof 300mm Clear (Inches on one side and cm/mm on the other)
Q-Connect£2.084.5★3,012 rev
Helix Oxford 12 inch 30cm Shatter Resistant Ruler
Helix£2.244.7★4,571 rev
Helix 15cm / 6 Ruler - Clear
Helix£2.334.6★2,824 rev
Q-Connect 300mm/30cm Clear Ruler
Q-Connect£1.014.4★815 rev
QincLing 3-Piece Plastic Ruler Set Clear Straight Ruler 6 8 12 Inches (15 20 30cm) Measuring Tool for Students & Offices
QincLing£3.534.5★804 rev
Newest
by launch date
5Pack 30cm Thick Clear Plastic Ruler 12 Inches Shatter Resistant Metric Transparent Straight Measuring Ruler Tool (30CM)
Guagua£4.1022 rev
18Pack 12 Inch Clear Plastic Ruler Shatter Resistant Metric Transparent Straight Measuring Ruler School Classroom Home or Office
Nakalixir£3.8412 rev
VELSIN Plastic Transparent Straight Ruler - Clear Soft Bendable Ruler with Centimeters and Inches Measuring Tool for School Student Office - 20 cm/8 inch
VELSIN£2.566 rev
VELSIN 2 Pcs Ruler - 15 cm Transparent Straight Folding Ruler 30cm Foldable for school or office daily DIY Student Convenient Storage
VELSIN£3.383 rev
4Pcs Plastic Ruler Set 30cm/12inch Clear Ruler Kit Transparent Straight Ruler Measuring Tool for Student Classroom School Office Home
RUILILANG£3.912 rev
Trending
90-day click momentumVELSIN Plastic Transparent Straight Ruler - Clear Soft Bendable Ruler with Centimeters and Inches Measuring Tool for School Student Office - 20 cm/8 inch
VELSIN£2.564.7★
VELSIN 2 Pcs Ruler - 15 cm Transparent Straight Folding Ruler 30cm Foldable for school or office daily DIY Student Convenient Storage
VELSIN£3.382.6★
Helix Oxford 12 inch 30cm Shatter Resistant Ruler
Helix£2.244.7★
Helix 15cm / 6 Ruler - Clear
Helix£2.334.6★
5Pack 30cm Thick Clear Plastic Ruler 12 Inches Shatter Resistant Metric Transparent Straight Measuring Ruler Tool (30CM)
Guagua£4.104.7★
What buyers say about ruler
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent product”
“Good value”
“Just as advertised”
“The plastic feels sturdy”
“Handy”
“Clear, Sturdy And Built For Everyday Measuring”
“good size”
“Theyll never break for sure”
“18Pack 12 Inch Clear Plastic Ruler - good quality, great price”
“The ruler itself is very lightweight”
What buyers complain about
“Relatively thin,”
“Extremely poor quality, bends easily”
“Very flimsy”
“The metric markings on the twelve inch ruler were blurred / missing from about 0 to 3”
“Break Easily”
“bends easily”
“as a tool they're less practically useful”
“There is 2 stickers that are hard to remove”
“not cheap-however an indispensible item”
“they feel more average than heavy duty”
Top return reasons
Common questions
- Is ruler profitable to sell on Amazon United Kingdom?
- The niche generates £255K/yr across 31 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is +13.9%. Flapen's verdict: Worth a look (56/100).
- How competitive is the ruler niche?
- 21 brands and 113 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 67% of demand.
- What do buyers complain about in ruler?
- Top complaints mined from reviews: Thickness, Quality-Overall, Strength. The return rate is 0.2%.
- When does demand for ruler peak?
- Demand peaks in Aug–Sep; the busiest month runs 3.4× the quietest.
- What does it cost to enter the ruler niche?
- Listings span £1.01–£5.77; the average listing price is £3.26 (sweet spot $15–$100). The average incumbent carries 1,064 reviews — the moat a new listing must climb.