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Fly screen for midges: the stated weave, not stars

Updated: 21 October 2026

A July evening on the west coast, or beside a still pond, is a different insect from a house fly in a London kitchen. You can leave the door screened and still come in bitten, because a fly screen for midges is about hole size and gaps, not stars. UK mesh makers do not agree which weave is enough, and most curtains here do not print one. Sizes and prices stay on the [magnetic fly screen comparison](/hub/hedges-and-privacy-screens/fly-screen-magnet). Products Compared did not count insects in a lab. The figures below are the makers' own, not a test of these ASINs.

A July evening on the west coast, or beside a still pond, is a different insect from a house fly in a London kitchen.

Our top picks

WENT WENT magnetic door curtain, 110 × 220 cm

Best overall

WENT WENT magnetic door curtain, 110 × 220 cm
9.8/10about £11.99
View offer
Flux Phenom Flux Phenom magnetic door curtain, up to 90 × 210 cm

Alternative

Flux Phenom Flux Phenom magnetic door curtain, up to 90 × 210 cm
9.7/10about £18.95
View offer
SMALUCK SMALUCK magnetic door curtain, 80 × 200 cm

Best value

SMALUCK SMALUCK magnetic door curtain, 80 × 200 cm
9.6/10about £13.99
View offer
On this page
  1. 1.Why midges are a mesh question
  2. 2.Two UK makers, two answers
  3. 3.What these listings actually say
  4. 4.What to buy if midges are the point

Why midges are a mesh question

A midge is smaller than the flies and mosquitoes on a typical curtain bullet. If the hole is larger than the insect, it goes through. If the hem stops short, it goes round. You need a stated weave and no gap. More magnets do not shrink the yarn. These listings are polyester, nylon or fibreglass, and none of the specialist guides tested them. Home Fair Blinds notes that wind can part a centre split. Choose curtain or kit first, in the magnetic fly screen buying guide.

Two UK makers, two answers

Streme treats 18×16 as fly mesh and states 30×20 for midges. It says 20×20 and 18×16 will not keep midges out. That is a maker's position, not our measurement. The Scottish Shutter Company describes 20×20 with a clear opening of about 0.94 mm, against a Highland biting midge wingspan of about 1.4 mm, and prefers it on large screens because 30×20 cuts air and light. Moskera describes 18×16 holes of about 1.1 to 1.5 mm as a mosquito grade. Do not average the two midge answers. The 1.4 mm wingspan belongs to the shutter company. The rejection of 20×20 belongs to Streme.
WENT WENT magnetic door curtain, 110 × 220 cm

Testsieger

WENT WENT magnetic door curtain, 110 × 220 cm
9.8/10about £11.99
View offer

What these listings actually say

Flux Phenom is the only door curtain here that states a hole size: 1 mm, for gnats, mosquitoes and flies, with 52 magnets. It does not print 18×16, 20×20 or 30×20. That 1 mm claim is not Streme's 30×20, and this file has no midge count for it. WENT, SMALUCK and DDGAO leave the hole size blank. A 4.6 does not fill a blank. NeatiEase and MiLeJu are fibreglass with no weave count, and two UK reviews say small bugs still pass the MiLeJu kit. JOOFAN does not name the mesh. The ordinary-door ranking is best magnetic fly screen.

What to buy if midges are the point

If midges are the point, buy a stated 20×20 or 30×20 from a seller who also names the airflow cost. That product is outside this amazon set. Do not invent a framed 30×20 price. A fibreglass door screen around £29.99, and some DIY kits nearer £59 to £119, are other specifications, checked on 19 October 2026. Use these curtains for ordinary flies once the cloth overlaps. WENT is the wide one, SMALUCK the 80 cm one, Flux Phenom the 1 mm line. None of that is midge-proof. A fine cloth still fails if the centre blows open. Ask for the weave in writing before you pay.

Common questions

What weave do Highland midges need?
There is no single number these UK sources share. Streme says 30×20, and says 18×16 and 20×20 will not do. The Scottish Shutter Company argues that 20×20, about 0.94 mm, is under a 1.4 mm wingspan. An unstated polyester curtain is not that choice.
Is 20×20 enough?
Streme says no. The Scottish Shutter Company says yes for the wingspan they quote, and would rather fit 20×20 than 30×20 on a large screen. Both are maker guides, not a test of these curtains. You still need a fit without gaps.
Is 1 mm the same as 30×20?
No. Flux Phenom states 1 mm holes and does not print 30×20 or 20×20. One millimetre is a listing claim, not Streme's midge grade, and this file has no midge trial of that curtain.
Will more magnets stop midges if the weave is unstated?
No. Magnets close a split. They do not shrink the holes in the yarn. Flux Phenom's 52 magnets are not a weave count for WENT or SMALUCK. A gap still beats any cloth.
Do gaps matter more than the cloth?
They matter at least as much. The Scottish Shutter Company says gaps and open doors outweigh the step from 20×20 to 30×20. A short hem or a parted centre beats a fine cloth.
Should I buy a specialist framed screen instead?
Yes, if you want a weave count in the description. This set is mostly unstated hole sizes, from about £11.99 to £29.90. A specialist 20×20 or 30×20 screen is a different buy, and this page will not invent its price.

Related pages

Magnetic fly screen door or window

Fly screen magnet

Best magnetic fly screen: only when the width fits

Magnetic fly screen buying guide: measure the frame

How to fit a magnetic fly screen: one clean press only

Sources

Public UK sources named below. amazon.co.uk prices, stars and review counts are from the seven listings in this comparison, captured on 19 October 2026. Page updated 21 October 2026.

  1. GOV.UK, General Product Safety Regulations 2005 (retrieved 19 October 2026)
  2. Consumer Rights Act 2015, section 20 (retrieved 19 October 2026)
  3. GOV.UK, placing UKCA or CE marked products on the market (retrieved 19 October 2026)
  4. Streme, which mesh for midges (retrieved 19 October 2026)
  5. Scottish Shutter Company, midge mesh guide (retrieved 19 October 2026)
  6. MOSKERA, how to measure a magnetic door screen (retrieved 19 October 2026)
  7. Home Fair Blinds, magnetic door screens (retrieved 19 October 2026)
  8. Flyscreen Queen fitting instructions (retrieved 19 October 2026)