Leather Thickness for Wallets and Card Holders

For wallets, think medium weight outside and lighter leather inside. One supplier says medium weight leathers between 4 and 7 oz are generally used for bags and wallets¹. That's a wide band, so the detail matters.

Inside and outside

A thickness chart from a US supplier splits a wallet into two jobs. It lists 2-3 oz for wallet interiors, and 3-4 oz for wallet exteriors². In millimetres, that's 0.8 to 1.2 for the inside and 1.2 to 1.6 for the outside².

An Australian supplier's list lines up with the lower end. It gives 1.2 to 1.6 mm for lining, embossing, light bags and light wallets, and 1.6 to 2.0 mm for wallets, bags and chaps³.

The sources overlap but don't match exactly. Treat each as a guide, not a rule.

Another supplier calls 1-3 oz leather ideal for lining¹. So the inside of a card holder can be thin, because it doesn't carry the shape.

Why layers matter

For anything with several layers, such as a wallet with a lining, the combined thickness matters as much as the individual layer². A card holder built from two layers of 3 oz leather stacks up to a thicker build than the label on either piece suggests.

Folds add bulk too. Where leather bends over itself at a spine, the stack grows fast. Choose the outer piece with that in mind.

Here's a way to think it through. Start with the pocket or slot that holds cards, since it's the part that gets stacked. Keep it light. Then pick the outer shell, which carries the stitching and the wear. Last, add up the layers at the thickest spot, usually the fold, and ask whether you'd be happy carrying that every day.

Don't go too thin

If leather is too thin, stitches can pull through². That's the main risk with slim goods. A thin piece may feel lovely in the hand and then give way along the stitch line.

So the aim is the lightest leather that still holds its stitching. A few ways to get there:

• Use the heavier end of the outer range where the stitching and wear land.
• Use a lighter weight for the lining and card slots.
• Measure the finished stack, not just each piece. A caliper reading of the folded stack is the easy way, and the home routine shows it.
• Remember that thickness changes from spot to spot, so measure the exact area you plan to cut.

If you want the pieces in millimetres, work from the ounce conversion table. Belts and straps call for heavier leather, and that's on the belts and straps page.

Sharp tools apply here as with any leather job. Cut away from your body, keep blades covered when you set them down, and keep them away from children.