The below measurements are approximate:
8g through 2g have 12mm rose.0g has a 9/16" rose.00g has a 5/8" rose.7/16" has an 11/16" rose.
1/2 has a 3/4" rose.9/16" has a 15/16" rose.5/8" has a 1-1/8" rose.3/4" has a 1-1/4" rose.
7/8" has a 1-3/8" rose.
1" (25mm) has a 1-1/2" rose.
2g and 0g have a 5/16" wearable area. 00g through 12mm have a 3/8" wearable area. 9/16" through 1" (25mm) have a 7/16" wearable area.