Why Thickness Varies Across a Hide

Thickness varies across the entire span of a hide, and leather is thinnest along the edge¹.

It's thinnest at the edge

Leather is thinnest along the edge¹. So a strip cut from the border of a hide may read lighter than one cut from further in. Measure at the edge and then in the middle, and expect a gap.

Another supplier puts it bluntly: there are always slight variations in thickness, so hides seldom match the 1/64 inch per ounce rule everywhere². A hide isn't faulty when it shows this. It's the usual picture.

What a range on the label means

An Australian supplier notes that thickness varies a little across every hide, and says its chart builds that variance in³. That's why its ounce bands are ranges. For example, its 3-4 oz band is 1.2 to 1.6 mm³.

So a label with a range covers the variance the supplier expects across a hide³. Measure the part you'll use.

A quick test you can run

Take your caliper and read the piece at a few spots well in from the edges. Then read it close to an edge, where leather is thinnest¹. Write the numbers down. Now you know your piece's own spread.

Splitting and consistency

Hides run through a splitting machine are more consistent, but still not perfect². So even a machine-evened piece will show small differences. Don't expect a sheet that's the same all over. The Australian supplier agrees that thickness shifts a little from place to place on every piece³. The US supplier adds that hides rarely measure to the exact figure throughout². Treat any single number as a label, then measure. In short, the sources agree on three things. Thickness varies across a hide¹. A labelled range covers that variance³. Even split hides are not perfectly even². Put those together and the plan is simple: read the label, then check the real piece with your own gauge or caliper before you cut anything. Keep your readings with the piece, so you can see how far they sit from the label next time.

What you can do about it

• Measure the part of the hide your item will use, well in from the edge.
• If you can, check two or three spots on the piece before you cut.

Thickness varies across a hide, so measure the part you'll use. To check readings yourself, there's a short routine in taking a reading.

For typical weights by project, look at the pages for wallets and for belts and straps. Treat each as a starting range.