Leather Thickness Conversion Chart
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Leather Weight/Thickness

Conversion Chart

How is the thickness of leather measured?

Leather thickness is typically measured in ounces in the USA. This unit of measurement of leather does not convey weight in the formal sense, but rather the thickness. Since it is crucial to have the correct thickness of leather for a particular project, it is also critical to know ounce measurements if you are purchasing from the USA.

So how thick is each ounce of leather?

One ounce of leather equals 0.4mm or 1/64 of an inch. Therefore 9 ounces is equal to 3.6mm or 9/64 of an inch and so on. Below is our leather thickness conversion chart for quick conversions. Please take into account, each piece of leather has a slightly variable thickness over the entire hide, our chart below reflects this variance.

Millimeter Thickness

Inch Thickness

Ounce Thickness
.8 – 1.2 mm

1/32" – 3/64"

2 – 3 oz

1.2 – 1.6 mm

3/64" – 1/16"

3 – 4 oz

1.6 – 2.0 mm

1/16" – 5/64"

4 – 5 oz

2.0 – 2.4 mm

5/64" – 3/32"

5 – 6 oz

2.4 – 2.8 mm

3/32" – 7/64"

6 – 7 oz

2.8 – 3.2 mm

7/64" – 1/8"

7 – 8 oz

3.2 – 3.6 mm

1/8" – 9/64"

8 – 9 oz

3.6 – 4.0 mm

9/64"– 5/32"

9 – 10 oz

4.0 – 4.4 mm

5/32" – 11/64"

10 – 11 oz

4.5 - 5.4mm

1/4" - 14/64"

12- 13 oz

5.5 - 6.4mm

15/64" - 19/64"

14 - 15 oz

6.5 - 7.4mm 20/64" - 5/8"

16 - 17 oz

So what thickness of leather do I need?

As mentioned above, it is vital you get the correct thickness of leather for each project. Our list here is a good guide to give you an idea of what thickness of leather you may need for different projects.

 

 

MM Thickness

Common Projects/Leather Types

.8 – 1.2mm

lining, embossing

1.2 – 1.6mm

lining, embossing, light bags,

light wallets

1.6 – 2.0mm

wallets, bags, chaps

2.0 – 2.4mm

phone and tablet cases,

book covers, light moccasins,

chaps

2.4 – 2.8mm

heavy cases, covers, chaps,

moccasins

2.8 – 3.2mm

moccasins, light sheaths,

light holsters, belts

3.2 – 3.6mm

standard belts, standard sheaths,

straps, medium holsters

3.6 – 4.0mm

bridle sides, bridle backs,

heavy holsters, heavy belts, light armor,

swell cover sides

4.0 – 4.4mm

bridle sides, bridle backs, heavy straps, medium armor, stirrup backs

4.5 – 5.4mm

girth point rumps, latigo sides,

men's sole bends, saddlery

skirting sides, rein backs

5.5 – 6.4mm

girth point rumps, harness sides,

harness backs, heavy men's sole bends

6.5 – 7.4mm

super heavy men's sole bends,

super heavy harness sides

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