Leather thickness is usually measured in ounces. One ounce equals 1/64" in thickness. Thus, a weight of 7 to 8 oz. means the leather is 7/64" to 8/64" in thickness or approximately 1/8" thick. The thickness of leather varies to some extent throughout the hide. This is why leathers are usually shown with a range of thickness such as 4 to 5 oz., or 6 to 7 oz. As a comparison, a quarter (coin) is equal to a 4 oz. thickness.A standard thickness for belts is a 7 to 8 oz leather.

At Zelikovitz Leathers, we get a lot of inquiries from all over the world regarding the thickness of leather. As most leather is sold in Ounce thickness, the approximate equivalent in inch fractions or millimeters can be compared below. For those in the shoe trade who are used to measuring in "Irons" this chart should be helpfull to you as well.

 

Leather Thickness Chart

Ounce                MM            Iron           %Inch          Decimal Inch

1                 0.4            0.75            1/64              0.016

2                 0.8            1.5              1/32              0.031

3                 1.2            2.25            3/64              0.047

4                 1.6            3                 1/16              0.063

5                 2               3.75            5/64              0.0 78

6                 2.4            4.5              3/32               0.094

7                 2.8            5.25            7/64               0.109

8                 3.2            6                 1/8                0.125

9                 3.6            6.75            9/64               0.141

10                 4              7.5               5/32               0.156

11                4.4            8.25            11/64                0.172

12                4.8            9                  3/16                0.188