0 gauge through 1/2 inch have a 3/8 inch wearable area.
9/16 inch through 1 & 1/2 inch have a 1/2 inch wearable area.
1 & 5/8 inch through 2 inch have a 9/16 inch wearable area.
(Note, organic plugs may slightly vary in size and length, but we try to make the best match possible.)