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The standard term for the thickness of leather is ounces.

The measurement of the thickness of a finished leather in
millimeters (1 mm. = 0.03937 inch),
irons (1 iron = 1/48 inch),
ounces (1 ounce = 1/64 inch):

Inch

Ounces

Irons

Millimeters

1/64
1/32
3/64
1/16
5/64
3/32
7/64
1/8
9/64
5/32
11/64
3/16
13/64
7/32
15/64
1/4
17/64
9/32

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

0.75
1.5
2.25
3.0
3.75
4.5
5.25
6.0
6.75
7.5
8.25
9.0
9.75
10.5
11.25
12.0
12.75
13.5

0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
4.4
4.8
5.2
5.6
6.0
6.4
6.8
7.2

 

Yardage Estimator

The following figures represent the approximate yards of 54" material and square footage of leather based upon 1 YD = 18 Sq. Ft. needed to upholster the type of furniture shown.

With small hides, cutting pieces should be specified to obtain square footage. As a rule of thumb, when ordering custom sofas, order approximately 2 1/2 YDS=45 S.F. per liner foot.

1 YD. = 18 S.F.

12 YDS. = 216 S.F.

2 YDS. = 36 S.F.

13 YDS. = 234 S.F.

3 YDS. = 54 S.F.

14 YDS. = 252 S.F.

4 YDS. = 72 S.F.

15 YDS. = 270 S.F.

5 YDS. = 90 S.F.

16 YDS. = 288 S.F.

6 YDS. = 108 S.F.

17 YDS. = 306 S.F.

7 YDS. = 126 S.F.

18 YDS. = 324 S.F.

8 YDS. = 144 S.F.

19 YDS. = 342 S.F.

9 YDS. = 162 S.F.

20 YDS. = 360 S.F.

10 YDS. = 180 S.F.

21 YDS. = 378 S.F.

11 YDS. = 198 S.F.

22 YDS. = 396 S.F.

 

1 YD = 36"x54" = 1944 Sq. In. / 144 Sq. In. (12"x12") = 13.5 Sq. Ft - Order 18 Sq. Ft. - Diff = Loss Factor.