This item is hand carved from organic material and the gauge will vary +/- up to 0.5mm.
These are ebony wood plugs with ash wood inlays.
You will receive a left/right with a pair.
00g thru 7/8" have a 3/8" wearable.
1" and up have a 7/16" wearable.
These plugs tend to run a little small.