7 CFR § 51.1566 - Metric conversion table.

Inches	Millimeters (mm)
1/8 equals	3.2
1/4 equals	6.4
1/2 equals	12.7
3/4 equals	19.1
1 equals	25.4
1 1/2 equals	38.1
2 equals	50.8
2 1/2 equals	63.5
3 equals	76.2
3 1/2 equals	88.9
4 equals	101.6
4 1/2 equals	114.3

Ounces	Grams
1 equals	28.35
4 equals	113.40
5 equals	141.75
6 equals	170.10
7 equals	198.45
8 equals	226.80
9 equals	255.15
10 equals	283.50
12 equals	340.20
14 equals	396.90
16 equals	453.60
18 equals	510.30
19 equals	538.60
20 equals	567.00