1, the normal size of jeans under size 34 should be reduced by 7, and the size larger than size 34 should be reduced by 8- 12 in turn.

2, for example: 30 yards is MINUS 7, which is 23 inches, which is 2 feet 3; 38 yards is MINUS 9, which means 29 inches, which means 2 feet 9.

3. Pants size comparison table