Crafts: Grommets

Grommets are almost always specified by inside diameter (ID), not outside diameter (OD).

Here are common grommet sizes, with the most common being size 3, which has a 7/16″ inside diameter.

Size No.
00
0
1
2
3
4
5
6
7
8
10
12 special
Diameter (of the grommet center hole after installation)
3/16 inch
1/4 inch
9/32 inch
3/8 inch
7/16 inch
1/2 inch
5/8 inch
13/16 inch
15/16 inch
1 1/16 inch
1 1/2 inch
1 9/16 inch

 

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