String Line
String Line shows low returns (0.3%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Flapen Score
Is String Line profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, String Line is a £206K/yr Amazon United Kingdom market (215K searches/yr). The top 5 brands hold 65% of demand. Demand peaks in Mar–Apr–May. Verdict: Worth a look — 56/100.
String Line: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Worth a look. Search demand moved +3.9% over the last 90 days and 12.0% of searches end in a purchase.
£206K
revenue / yr
Who owns the niche?
The top 5 brands hold 65% of demand, so 35% of the market is open.
35%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.
0/100
page quality · 21 products
Top String Line products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
Rolson 52606 Brick Line 100 m Green
- Price
- £4.17
- Rating
- 4.2/5
- Reviews
- 1,273
- Age
- 13y ago
Spear & Jackson 10505Z Line and Pins
- Price
- £7.72
- Rating
- 4.4/5
- Reviews
- 926
- Age
- 16y ago
OX Pro Nylon High Vis Builders Line 105m / 350ft - Cyan
- Price
- £6.77
- Rating
- 4.2/5
- Reviews
- 1,403
- Age
- 12y ago
Green 328 Feet Mason Line Braided Brick Line for Building Gardening Marking and DIY Projects
- Price
- £5.50
- Rating
- 4.3/5
- Reviews
- 743
- Age
- 6y ago
Tracer 100m String Line Anti-Tangle Hi-Vis Builders & Bricklaying Line
- Price
- £10.27
- Rating
- 4.5/5
- Reviews
- 162
- Age
- 2y ago
Trending
90-day click momentum
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
Draper 100m Orange Ranging Line | Polypropylene Rope on Spool | Bricklaying String | Garden Twine | Chalk Line | Builders Tool | 28821
- Price
- £5.47
- Rating
- 4.6/5
- Reviews
- 309
- Age
- 13y ago
Dekton 100m Brick Line with Holder | High-Visibility 100m Masonry String | Plastic Spindle Handle & Lock | Ideal for Bricklaying & Construction Work
- Price
- £5.11
- Rating
- 4.2/5
- Reviews
- 15
- Age
- 1y ago
Spear & Jackson 10505Z Line and Pins
- Price
- £7.72
- Rating
- 4.4/5
- Reviews
- 926
- Age
- 16y ago
Blue Spot 34638 82m Brick Line
- Price
- £4.70
- Rating
- 4.5/5
- Reviews
- 550
- Age
- 19y ago
Newest
by launch date
Grettz 100m 8 Braid Green Stringline with Weatherproof Anti-Tangle Reel High Visibility Builders String Line for Bricklaying Landscaping & Construction
- Price
- £8.41
- Rating
- 4.4/5
- Reviews
- 63
- Age
- 11mo ago
Grettz 100 m Heavy-Duty 8-Braid Nylon Stringline High-Visibility Yellow Bricklaying & Landscaping Line for Masonry Construction & DIY Projects
- Price
- £8.31
- Rating
- 4.4/5
- Reviews
- 19
- Age
- 11mo ago
Dekton 100m Brick Line with Holder | High-Visibility 100m Masonry String | Plastic Spindle Handle & Lock | Ideal for Bricklaying & Construction Work
- Price
- £5.11
- Rating
- 4.2/5
- Reviews
- 15
- Age
- 1y ago
OX Trade 30m/100 ABS Chalk Reel w/Grip Value Pack - Standard Bold Line / 6:1 Gear Ratio
- Price
- £9.60
- Rating
- 4.4/5
- Reviews
- 260
- Age
- 1y ago
Tracer 100m String Line Anti-Tangle Hi-Vis Builders & Bricklaying Line
- Price
- £10.27
- Rating
- 4.5/5
- Reviews
- 162
- Age
- 2y ago
Competition: brands, sellers & click share
The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.
Brands
15 falling
Sellers
83
Top-5 brand share
65%
Top 20: 100%
Top-5 click share
55%
Top 20: 99%
Open market
26%
- tenn well16%
- Rolson14%
- OX Tools12%
- Spear & Jackson11%
- Blue Spot Tools11%
- Tracer9%
String Line demand & seasonality
Weekly search volume, with the niche's key stats alongside.
Peak months: Mar, Apr, May · busiest ÷ quietest = 2.3×
Top String Line search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- string line110K/yr
- builders line25K/yr
- brick line33K/yr
- builders string line11K/yr
- bricklayers line13K/yr
- bricklaying line16K/yr
- stringline4K/yr
- builders string4K/yr
What reviews say buyers love and hate about String Line
What buyers mention most, as a share of all reviews.
What buyers love
90% of reviews“Excellent Product”
“Good product in good price”
“Easy to use”
“Nice apart from the colour”
“Exactly as described”
What buyers complain about
83% of reviews“Poor quality control prior to shipping”
“Broke first use”
“Thin”
“The plastic has a cheap feel”
“so pale in colour that you can't see it”
String Line return rate & reasons
Why buyers send it back, as a share of all return requests.
0.3%
Return rate
20%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common String Line questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
