Standard Wire Gauge (SWG) to Millimeter Conversion Chart

Gaugemm DiameterCommon Uses 
8g.4
9g. 3.5
10g.3Welded mesh (50mm aperture):

  • Security fencing, strong garden fencing
  • large-dog enclosures
12g.2.5Welded mesh (50 mm aperture):

  • Security fencing, garden fencing
  • large-dog enclosures, sheep, deer & goat fencing
14g.2Welded mesh (25mm – 50mm aperture):

  • Garden fencing
  • medium-dog enclosures, fox, sheep, deer, goat fencing
15g.1.8
16g.1.6Welded mesh (13mm – 25mm aperture):

  • Small bird aviaries, pet rabbit runs etc.

Welded mesh (13mm– 20mm aperture):

  • Rodent cages and parakeet aviaries

Welded mesh (25mm aperture):

  • Cat enclosures, squirrel protection, tree guards

Welded mesh (50mm aperture):

  • Garden fencing. Small-dog enclosures
17g.1.4
18g.1.2Chicken wire (31mm aperture):

  • Poultry enclosures, rabbit protection

Welded mesh (13mm – 25mm):

  • Small bird aviaries, pet rabbit runs etc.
19g.1Chicken wire (50 mm aperture):

  • Poultry enclosures.

Rabbit netting can (31 mm aperture):

  • Rabbit protection

Welded mesh you (13mm – 25mm aperture):

  • Small bird aviaries, pet rabbit runs etc.
20g.0.9Chicken wire (25mm aperture:

  • Poultry enclosures, roof thatching, loft insulation 
21g.0.8
22g.0.7Chicken wire help (13mm aperture):

  • Poultry enclosures, fruit cages

Fine welded or woven mesh:

  • Rodent protection, wild bird feeders
23g.0.6Fine Stainless woven mesh:

  • Material and chemical filtration
25g.0.5Fine Stainless woven mesh:

  • Material and chemical filtration