How to choose a Copper mesh size

Let us introduce wire mesh size, 6 mesh indicates that in one inch there are 6 openings. You could easily pass a pencil through the openings.

22 mesh indicates that in one inch there are 22 openings. This mesh is used in a EMI & RFI shieldong screens.

100 mesh indicates that in one inch there are 100 openings and it is used in oil filters.