A glasses case is a good first piece of leatherwork because it asks for only a few sound habits: measuring, cutting squarely, preparing edges, and sewing an even line. It need not be ornate. A folded slip case made from firm vegetable-tanned leather will protect spectacles from scratches in a bag or coat pocket, while leaving the leatherwork visible and easy to repair.
The version below has a folded bottom, a narrow welt at the seam, and two hand-stitched sides. The welt gives the case a little room and keeps the stitched edges from pressing directly against the frames. It is not a hard-shell case, so do not rely on it to protect glasses beneath heavy weight.
Materials and tools
Choose vegetable-tanned leather around 1.2 to 1.6 mm thick (roughly 3 to 4 oz). This weight is firm enough to hold its shape, yet still agreeable to fold and sew by hand. A slightly softer leather is pleasant for everyday use, but avoid leather so thin that the edges feel papery or the case collapses around the spectacles.
Gather the following:
- Vegetable-tanned leather for the main body
- A narrow offcut of the same leather for the welt
- Waxed linen thread
- Two blunt leather harness needles
- Stitching chisels or a pricking iron and awl
- A sharp utility knife or leather knife, cutting mat, steel rule, and scratch awl
- Edge beveler and fine abrasive paper
- Contact adhesive or a small amount of leather glue
- Gum tragacanth or beeswax for burnishing
- Wing dividers or a creaser for marking stitch lines
- Mallet or maul, stitching pony or simple clamp, and a lighter or thread snips
A small snap, stud, or short leather thong may be added later, but the basic case works well without hardware. A close-fitting slip case is quieter in use and avoids the need to set metal fasteners accurately.
Photo by Mohammad Javad Asgharikolahi on Unsplash.
Measure the glasses before making the pattern
Do not begin with a fixed pattern. Spectacles differ greatly in width, lens height, temple thickness, and curve. Measure the glasses when folded, rather than measuring the flat front alone.
Take three measurements:
- Width: Measure across the widest part of the folded spectacles, usually the outer edges of the frame.
- Height: Measure from the highest point of the folded frame to the lowest point.
- Thickness: Measure the depth of the folded glasses at their thickest point, including both lenses and temples.
For a simple folded case, make a paper pattern first. Its finished inside width should be the glasses width plus about 12 mm for ease. Its finished body height should be the glasses height plus about 15 to 20 mm, leaving room to grasp the frames at the opening.
The leather blank is one long rectangle folded at the bottom. Its width equals the finished inside width plus two seam allowances. With a 4 mm stitch line and approximately 4 mm beyond that line at each side, add about 16 mm overall to the desired inside width.
Its length equals twice the finished body height plus a small allowance for the bottom fold. Keep the folded end plain and square for the simplest form. If you want a softer opening, round the two upper corners of the rear layer only, creating a shallow flap behind the front edge.
For example, if folded spectacles measure 145 mm wide by 55 mm high, a useful finished inside space may be about 157 mm wide by 72 mm high. Add seam allowances to the width, double the body height for the length, then test the paper version around the glasses before cutting leather.
Make and test the paper mock-up
Cut the paper rectangle, fold it in half, and hold the sides with clips or masking tape. Slide in the glasses. They should enter without forcing, but should not rattle freely. Adjust the width before transferring the shape to leather. This small trial prevents the most discouraging mistake: sewing a handsome case that is too narrow for its intended frames.
Cut the leather and prepare the edges
Place the pattern on the flesh side of the leather and trace around it lightly with a scratch awl. Cut in several calm passes against a steel rule rather than trying to force the knife through in one stroke. Keep the knife upright; a sloped cut produces uneven edges that are difficult to finish neatly.
Cut two welt strips from a firm offcut. Each strip should be about 8 to 10 mm wide and slightly longer than the side seam it will serve. The welt will sit between the front and back layers, with its flesh side facing inward. It adds a modest gusset without requiring a separate shaped panel.
Bevel the outer grain-side edges before assembly. At this stage, bevel the top opening edges of the main piece and the outer edge of each welt strip. Do not try to bevel the seam edges that will later be glued together.
Lightly sand any fuzzy cut marks, then burnish the opening edges. Moisten them sparingly with gum tragacanth, or rub with a little beeswax, and work the edge with canvas, wood, or a burnishing tool until it darkens slightly and feels smooth. Leather responds best to restrained moisture; soaking it can leave a swollen, uneven edge.
Photo by Kristian Bøgh on Unsplash.
Assemble the folded case
Fold the main piece at its centre, grain side outward. Do a dry fit first with the glasses inside to confirm that the opening is comfortably sized.
Mark a stitch line on both side edges, about 4 mm in from the cut edge. A divider gives a quieter, more consistent result than judging each line by eye. Mark the matching lines on the welt strips.
Apply a thin coat of contact adhesive to the flesh side of one welt and to the inside edge of one case side. Let the adhesive become tacky according to its instructions, then press the welt into place. The welt should run from the folded bottom nearly to the top opening, stopping about 5 mm short of the rim. Trim it flush at the bottom if needed.
Repeat on the other side. Clip the case together while the adhesive settles, checking that the folded bottom is square and the top edges align. Binder clips work well if their jaws are padded with scraps of leather; bare metal clips can leave dents in damp or soft leather.
Once the sides are held, trim the layered edges flush with a sharp knife. A clean, unified edge makes the stitching and burnishing look deliberate.
Mark and punch the stitching holes
With the case still flat enough to support, run the pricking iron or stitching chisel along the marked line. A spacing of about 3 to 4 mm is comfortable for a small case. Begin near the top, work toward the fold, and aim to keep the final hole at least a short distance from the folded bottom rather than crowding the corner.
Punch through all layers carefully. Use a firm but controlled strike on a proper cutting board. If the leather shifts, stop and realign rather than continuing with a wandering row of holes.
At the top opening, keep the first hole around 6 to 8 mm below the rim. This leaves enough leather above the stitching to remain strong and gives the case a clean edge.
Photo by Angelina Litvin on Unsplash.
Saddle stitch the two seams
Cut a length of waxed linen thread about four times the seam length, with a little extra for finishing. Thread a needle onto each end. A saddle stitch is made by passing one needle through each hole from opposite sides, producing an independent lock at every stitch.
Start at the folded bottom. Pass one needle through the first hole and centre the thread so both ends are equal. For each following hole, pass the first needle through, then send the second needle through the same hole from the opposite side. Keep the needles from piercing the thread already in the hole; if you feel resistance, draw the first needle clear and approach the second at a slightly different angle.
Pull each stitch firm but not brutal. The goal is an even line with the leather edges held together, not a deeply pinched seam. Excessive tension can distort the case and leave the welt looking wavy.
At the final two holes, backstitch by returning through two previous holes. Trim the thread close to the leather. Waxed linen can be gently pressed into the stitch channel with a smooth tool. If you use a lighter to tidy a synthetic thread, keep the flame well away from the leather; wax and leather can darken quickly. Linen thread is better trimmed and pressed than melted.
Sew the second side in the same way. Before finishing the thread, place the glasses inside once more. The case should sit evenly, with the folded bottom supporting the frames rather than forcing them into a sharp crease.
Finish the seam edges and opening
Sand the stitched side edges lightly to make the layers level. Bevel the outer corners only enough to remove their sharpness. Then dampen the edges slightly, apply gum tragacanth or beeswax, and burnish with steady strokes. The aim is not a glassy, machine-perfect edge, but a compact edge that feels sealed and comfortable in the hand.
If the leather is dry, apply a very light leather conditioner after the case has rested. Keep conditioner away from the inside until you are sure it has absorbed; fresh oils can transfer to spectacle lenses or cloths.
A quiet closure option
Many cases need no closure if they are sized closely and carried upright. If you prefer some security, make a short leather tab from a narrow strip and stitch one end to the back wall, just below the opening. The free end may tuck behind the front lip. This creates a simple friction closure without snaps, rivets, or magnets.
Avoid a tight strap that crosses directly over the lenses. It can press the case inward and make removing the glasses unnecessarily awkward. A loose tuck tab is enough to discourage the frames from slipping out in a bag.
Common mistakes to avoid
Cutting before testing the pattern. A paper mock-up takes little time and reveals whether the case needs more width or depth.
Choosing leather that is too thick. Heavy leather can make a small case stiff at the fold and bulky at the seams. Moderate-weight leather is easier to shape and stitch.
Gluing the whole seam too heavily. A thin adhesive film is sufficient. Thick glue can smear at the edge, clog stitching holes, and resist burnishing.
Punching holes too near the edge. Leave enough leather outside the stitch line to prevent the seam from tearing under use.
Pulling the stitches unevenly. Stitch tension should be repeated from hole to hole. A steady hand produces a stronger seam than occasional hard tugs.
Over-wetting during burnishing. Damp leather is workable; soaked leather becomes soft, marked, and slow to dry. Use only enough moisture to settle the fibres.
A finished leather glasses case becomes more useful as it gathers small signs of handling: a softened rim, darker burnished seams, and the shape of the particular frames it carries. Its worth lies less in elaborate decoration than in a clean fit, sound stitches, and edges made carefully enough to last.