String Line Level
MaybeBuyers convert on 16.3% of searches. But prices span $2.74–$12.11, mostly outside the sweet spot, so String Line Level is a Maybe.
- Flapen Score
- 51 / 100Top 38% of 2,225 DIY & Tools niches · +2 vs the category median of 4951
- Market size
- £39K/yr40K searches / yr
- 90-day growth
- +44.5%search demand this quarter
- Competition
- 71%top-5 click share · 11 brands · 37 sellers
Flapen Score
String Line Level against its category
The dotted line is the DIY & Tools average. Past it, String Line Level is stronger. Inside it, weaker.
Market
The String Line Level market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for String Line Level 40K times last year and spent an estimated £39K. The top 5 brands take 81% of clicks. Demand peaks in Apr–May. Flapen scores it 51 out of 100, a Maybe.
01 · Demand
An estimated 16.3% of those searches ended in a purchase.
Shoppers searched for this 40K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 16.3% of those searches ended in a purchase. Searches in the last 90 days moved +44.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated £39K a year.
- Searches, last 12 months
- 40K
- Growth, 90 days vs prior 90
- +44.5%
- Conversion, latest week
- 16.3%
- Market size, estimated
- £39Ka year
- Peak month
- May5.2× the quietest month
- Top search term
- string line level18K searches a year
02 · Price
A sale here is worth £5.92.
Listings sell for £5.92 on average, from £2.74 to £12.11. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At £5.92 that is £1K to £3K a year per listing.
- Average price
- £5.92under the $15 to $100 sweet spot
- Price range
- £2.74–£12.11
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 6K–8K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £1K–£3K
- Returns
- 0.3%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
69% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 8.1% of listings are out of stock. The average listing ranks #1,771 within Measuring & Layout Tools. It carries 769 reviews at 4.16 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 69%
- Prime listings
- 100%
- Out of stock, average day
- 8.1%
- Average rank
- #1,771in Measuring & Layout Tools
- Average rating
- 4.16 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 769per listing
- Listings tracked
- 13
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 50 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
- 50 months
Products
Top String Line Level 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 22, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Stanley 0-42-287 Line Level
- Price
- £2.74
- Rating
- 4.3/5
- Reviews
- 3,433
- Age
- 18y ago

BUBBLE LEVELS - 7X Pocket Bubble Level for Builders Line | Hanging String Bubble Level Set for Building Trades Engineering Surveying Metalworking Landscaping or Construction (Red)
- Price
- £4.22
- Rating
- 4.3/5
- Reviews
- 550
- Age
- 4y ago

Presch Line Spirit Level 2 pcs. - Extremely Secure Hold Thanks to Safety Hooks - Lightweight Design for Perfectly Aligned String - Shatterproof Acrylic Glass - 360 Readable for Precise Alignment
- Price
- £9.16
- Rating
- 4.4/5
- Reviews
- 648
- Age
- 2y ago

BUBBLE LEVELS - 7X Pocket Bubble Level for Builders Line | Hanging String Bubble Level Set for Building Trades Engineering Surveying Metalworking Landscaping or Construction (Yellow)
- Price
- £3.92
- Rating
- 4.3/5
- Reviews
- 550
- Age
- 5y ago

2 pcs Hanging Bubble Line Level for Building Trades Engineering Surveying Metalworking and Other Equipment Measure (Yellow) (Aluminium)
- Price
- £6.74
- Rating
- 4.3/5
- Reviews
- 550
- Age
- 2y ago
Trending
estimated 90-day click momentum
BUBBLE LEVELS - 7X Pocket Bubble Level for Builders Line | Hanging String Bubble Level Set for Building Trades Engineering Surveying Metalworking Landscaping or Construction (Red)
- Price
- £4.22
- Rating
- 4.3/5
- Reviews
- 550
- Age
- 4y ago

String Line Level 5PCS Small Spirit Level for Bricklaying Tiling Surveying Engineering Compact Line Level for Fence Post Building & Metalworking (Yellow)
- Price
- £4.11
- Rating
- 4.4/5
- Reviews
- 8
- Age
- 1y ago

10 Pcs Mini Rope Bubble String Level Hanging Bubble Line Spirit Level for Building Trades Engineering Surveying and Other Equipment Measure(Two Easily Distinguishable Colours)
- Price
- £6.82
- Rating
- 4.1/5
- Reviews
- 102
- Age
- 3y ago

7PCS Mini String Line Level: 75×12mm Hanging Bubble String Line Spirit Level Ideal for Bricklaying Metalworking Tiling and Construction (Red)
- Price
- £4.32
- Rating
- 3.6/5
- Reviews
- 8
- Age
- 1y ago

Presch Line Spirit Level 2 pcs. - Extremely Secure Hold Thanks to Safety Hooks - Lightweight Design for Perfectly Aligned String - Shatterproof Acrylic Glass - 360 Readable for Precise Alignment
- Price
- £9.16
- Rating
- 4.4/5
- Reviews
- 648
- Age
- 2y ago
Newest
by launch date
String Line Level 5PCS Small Spirit Level for Bricklaying Tiling Surveying Engineering Compact Line Level for Fence Post Building & Metalworking (Yellow)
- Price
- £4.11
- Rating
- 4.4/5
- Reviews
- 8
- Age
- 1y ago

YXSJAS Line String with Handle Construction String with 5 Built in Levels Reloadable Line Reel 540 FT Braided Construction Nylon Str-ing Li-ne for DIY and Gardening Work Orange
- Price
- £12.11
- Rating
- 3.4/5
- Reviews
- 7
- Age
- 1y ago

7PCS Mini String Line Level: 75×12mm Hanging Bubble String Line Spirit Level Ideal for Bricklaying Metalworking Tiling and Construction (Red)
- Price
- £4.32
- Rating
- 3.6/5
- Reviews
- 8
- Age
- 1y ago

TXXATX 7 Pcs String Line Level Post 75mm Hanging Bubble Line Impact Resistant Spirit Level for Plumbing Surveying Bricklaying Engineering Metalworking Tiling Building Trades
- Price
- £5.17
- Rating
- 4.2/5
- Reviews
- 84
- Age
- 1y ago

Orange 328 Feet Bricklaying Line Braided Brick Builders Line Strong String Line for Building Gardening Marking and DIY Projects
- Price
- £5.83
- Rating
- 4.3/5
- Reviews
- 743
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 71% of clicks. A locked shelf that new listings rarely crack.
Brands
11 falling
Sellers
37
Est. top-5 brand share
81%
Top 20: 100%
Est. top-5 click share
71%
Top 20: 100%
Open market
14%
- STANLEY37%
- Bubble Levels23%
- PRESCH11%
- VBNZBK5%
- ZALAOR5%
- TXXATX4%
- Open — no brand owns it (5 brands, 14%)
Demand
String Line Level search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May · busiest ÷ quietest = 5.2×
Search terms
Top String Line Level search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- string line level18K/yr
- line level10K/yr
- string line level kit8K/yr
- string level4K/yr
Reviews and returns
What reviews say buyers love and hate about String Line Level
We read the reviews and the return reasons for every product selling here.
“Levels were incredibly inaccurate and flimsy”
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.
19 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 String Line Level 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








