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SBSheath Bench Notes

Making and Fitting a Welt

What a welt does in a knife sheath, how to cut it, test it with the knife, and glue it so the stitching stays clear of the blade edge.

Updated 2 November 2026

A welt is an extra strip of leather that sits between the front and back pieces, along the side where the knife's edge lies.1 That's the whole idea: the knife's edge meets leather, not thread.1

Fitting a welt, in order

Fitting a weltCut welt, extra on the outsideTest fit with the knifeRough up and apply cementPress the layers togetherSand the edge flush
Test before the glue, because the glue gives you one try.

Cut the welt

  • Work from your welt pattern. If you haven't drawn one, see the pattern guide.
  • When cutting the welt, leave a little extra leather on the outside edge.1
  • That extra can be sanded off the finished sheath. It makes sure the leather ends up flush.1
  • One tutorial cuts the welt from a strip of leather trimmed off the sheath pieces.2

How thick?

None of the pages saved for this site gives a single welt thickness, so there's no number to quote here. What they do say is useful.

  • Make sure your knife has enough space to lie inside the sheath with the welt in place.1
  • The handle is thicker than the blade. To suit it, one maker built the welt up with tapered wedges.2
  • Check fit with the knife before gluing. Test fit often.2

Test fit

  • Mark where the edge of the welt will lie by tracing it with a pencil.1
  • Trace the actual welt leather you've cut. The cut pieces can come out larger or smaller than the template.2
  • Put the knife in with the welt in place.

Once the welt is glued in, it's almost impossible to make adjustments. Test the sheath with the welt in place before you apply the contact cement.1

Glue it

Contact cement is a glue you apply to both surfaces. You press them together once it has set.1

Safety first. One tutorial warns against breathing the cement's fumes. Open a window, go slow and cover the surfaces to be joined thoroughly.2 Follow the label and the safety data sheet from the maker of your cement, and work with ventilation. Keep blades and solvents away from children.

  • Rough up the smooth side of the welt with a file.1
  • Apply cement to the traced area, to the same area on the other side of the sheath, and to both sides of the welt.1
  • Wait for the cement to set. Then press all three layers of leather firmly together.1
  • Lay the welt in carefully. You only get one try with contact cement.2
  • Clamp the sheath shut and let it sit overnight.2
  • Cover the leather so the clamps don't leave marks.2

Trim it flush

With the glue set, sand the edge.

  • Use 60-grit sandpaper on a belt sander until all three layers of leather are flush.1

Where the stitching goes

The welt guides the groove for the thread. Dampen the leather and use the cut welt to find the groove. The groove should fall in the middle of the welt.2

That's where the sewing begins, in the seam guide.

Tight corners and tapers

Welts are harder on tight corners or tapers. Weaver says adding a welt to a knife sheath can be difficult in those places.3 A Weaver video shows several ways to form them, including wet forming and cutting darts into the leather.3

A dart is a small cut that lets flat leather bend around a curve. The Weaver post is only a short description of a video, so it gives no measurements.

For wet forming, see Wet Forming a Sheath Around a Knife.

Further reading and sources

  1. Fashion a Leather Knife Sheath, Grit, from A Modern Guide to Knifemaking
  2. Making a Pocket Sheath, Grand Valley State University (hosted article)
  3. The Leather Element: Simple Ways to Add a Welt, Weaver Leather Supply