https://www.sx-wiremesh.com/wire-mesh/welded-wire-mesh.html

Wire Diameter(Gauge):

The thickness of the wire is expressed in gauges,with lower gauge numbers indicating thicker wires.Common gauges range from 8gauge(thicker,heavier duty)to 23gauge(thinner,lighter applications).

Mesh Size(Opening Size):

The size of the openings between the wires,usually expressed in inches or millimeters.Common mesh sizes include 1/4 inch,1/2inch,1 inch,2 inches,etc.

Smaller mesh sizes provide greater security and are often used for filtering or containing small animals,while larger mesh sizes are used for fencing and reinforcement.

Roll Size:

Welded wire mesh is often sold in rolls,with typical widths ranging from 2 to 8 feet and lengths from 25 to 100 feet or more.The welded mesh roll is usually packed with moistureproof paper and plastic film.