Leather Thickness Guide: Choosing the Right Leather Thickness for Every Project
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Selecting the right leather thickness is just as important as choosing the right type of leather. Whether you’re making a slim card holder, a handcrafted wallet, a luxury watch strap or a robust belt, using the correct thickness will improve the appearance, durability and functionality of your finished piece.
At British Leather Supplies, we stock premium vegetable tanned leather from world-renowned tanneries including Horween, Conceria Walpier and Badalassi Carlo in a range of thicknesses suitable for every type of leathercraft.
This guide explains how leather thickness is measured, which thicknesses are best for different projects, and how to choose the right leather for your next build.
How Is Leather Thickness Measured?
Leather is typically measured in millimetres (mm), although you may also see thickness quoted in ounces (oz), particularly in North America.
The two measurements are closely related:
|
Millimetres |
Approximate Ounces |
|
0.8 mm |
2 oz |
|
1.0 mm |
2.5 oz |
|
1.2 mm |
3 oz |
|
1.6 mm |
4 oz |
|
2.0 mm |
5 oz |
|
2.4 mm |
6 oz |
|
2.8 mm |
7 oz |
|
3.2 mm |
8 oz |
|
4.0 mm |
10 oz |
At British Leather Supplies, all leather is listed in millimetres to provide clear, consistent measurements.
Understanding Leather Thickness
Thickness affects far more than the weight of the leather.
It influences:
- Flexibility
- Structure
- Edge finishing
- Folding characteristics
- Stitching performance
- Comfort
- Durability
A leather that is perfect for a belt may be far too thick for a wallet, while leather designed for watch straps may not provide enough rigidity for larger bags.
Choosing the right thickness helps create professional results from the outset.
Recommended Leather Thickness by Project
Card Holders
Recommended thickness: 0.8–1.4 mm
Slim card holders benefit from thinner leather that folds neatly without becoming bulky.
Popular choices include:
- Buttero
- Pueblo
- Minerva Box
- Horween Shell Cordovan
Wallets
Recommended thickness: 0.8–1.6 mm
Wallet construction often combines different thicknesses.
Outer panels are commonly made from slightly thicker leather, while interior pockets may be skived or cut from thinner sections to reduce bulk.
Excellent wallet leathers include:
- Horween Genuine Shell Cordovan
- Buttero
- Pueblo
- Minerva Box
- Badalassi Wax
Watch Straps
Recommended thickness: 1.0–2.0 mm
The ideal thickness depends on the style of strap.
Dress watches typically use thinner leather, while field, pilot and vintage-inspired straps often use thicker leather for a more substantial appearance.
Many makers skive folded sections around the spring bars and buckle to improve comfort.
Belts
Recommended thickness: 2.5–4.0 mm
Belts require considerably thicker leather to provide the strength and rigidity needed for everyday wear.
Vegetable tanned full-grain leather is generally the preferred choice because of its durability and ability to burnish cleanly.
Bags
Recommended thickness: 1.6–3.0 mm
Leather thickness for bags varies according to the design.
Small handbags and pouches often use thinner leather for flexibility, while structured totes and satchels benefit from heavier hides that retain their shape.
Notebook Covers and Journals
Recommended thickness: 1.2–2.2 mm
Notebook covers should provide enough structure to protect the contents while remaining flexible enough to open comfortably.
Smooth vegetable tanned leather and Horween Dublin are particularly popular choices.
Knife Sheaths
Recommended thickness: 2.4–3.6 mm
Knife sheaths demand thicker leather capable of protecting both the blade and the user.
Vegetable tanned leather is preferred because it moulds well and produces strong, burnished edges.
Choosing Leather Thickness by Style
Slim and Minimalist Designs
Choose thinner leather between 0.8 mm and 1.2 mm.
Ideal for:
- Card holders
- Minimal wallets
- Luxury small leather goods
Everyday Accessories
Leather between 1.2 mm and 2.0 mm provides an excellent balance between durability and flexibility.
Ideal for:
- Wallets
- Watch straps
- Notebook covers
- Small bags
Heavy-Duty Leather Goods
Leather over 2.5 mm offers increased strength and rigidity.
Ideal for:
- Belts
- Sheaths
- Structured bags
- Workshop accessories
Should You Skive Leather?
Skiving is the process of reducing leather thickness in specific areas to improve folding and reduce bulk.
Professional leatherworkers commonly skive:
- Wallet pockets
- Folded watch strap ends
- Card holder interiors
- Bag seams
- Belt keepers
Even when working with premium leather, strategic skiving often produces cleaner construction and a more refined finished product.
Does Leather Thickness Affect Durability?
Not always.
A thinner full-grain leather can outlast a much thicker lower-quality leather.
Durability depends on several factors:
- Leather quality
- Tanning method
- Fibre density
- Construction
- Stitching
- Care and maintenance
Premium full-grain vegetable tanned leathers, including Horween Genuine Shell Cordovan, Buttero, Pueblo and Minerva Box, are all renowned for their long-term durability when used appropriately.
Does Leather Thickness Vary Across a Hide?
Yes.
Leather is a natural material, so slight variation in thickness across a hide or shell is completely normal.
For example:
- Shoulders may vary slightly across their width.
- Double shoulders can be thicker near the spine.
- Whole hides often become thinner towards the belly.
- Genuine Shell Cordovan naturally varies across the shell, making different areas suitable for different components.
These natural variations are expected and allow experienced leatherworkers to make the best use of each piece.
