All our celtic cross dimensions are specified in millimeters (mm). This table gives the relevant conversion from inches to millimeters.

InchesMillimeters
1/83.2
1/46.4
3/89.5
1/212.7
5/815.9
3/419.1
7/822.2
125.4
250.8
376.2
4101.6
5127.0
6152.4
7177.8
8203.2
9228.6
10254.0
11279.4
12304.8