Finished leather card wallet with one L-shaped hand-stitched seam and a fold on one side, resting on a wooden workbench.
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A Card Wallet With One Seam

ByPeter Joeseph 'Briefcase Maker' Kalafatis

One piece of leather, one fold, one line of thread. The fold does half the work.

A card wallet with one seam is a single piece of vegetable-tanned leather folded over on one side and stitched shut along the bottom and the open side in one continuous L-shaped line. That’s the whole object. A fold where a second seam would be, a pocket that opens at the top, and maybe a thumb notch so the cards come out without a fight. It’s small enough to cut from a scrap and finish in an evening, and it punishes every sloppy hole, because on a seam this short there’s nowhere for a wandering stitch to hide.

Video: How to Make a Simple, Easy Leather Card Wallet by Hand for Beginners, from Weaver Leather Supply on YouTube.

That video isn’t mine. It’s Weaver Leather Supply building its minimalist card wallet, which Weaver describes as a fold-over design made from a single piece of leather with hand stitching, “a basic, useful project that builds foundational leatherworking skills.” Their fold and their seam sit a little differently from the layout here. The skills are the same ones.

What goes on the bench

Thin leather, sharp tools, and a card to measure from.

Paper template for a leather card wallet tested with a card before cutting the leather blank.

The leather is the decision that matters, so start there. Makesupply’s build-along for its card sleeve template suggests 2 to 4.5 oz leather and says it plainly: “The 3-4 oz. range is a sweet spot for this sleeve.” It recommends vegetable-tanned leather because chrome-tanned and very soft hides are hard to burnish by hand. Weaver’s own minimalist wallet page shows the same pattern in three leathers, one of them a 3-4 oz veg tan.

  • Leather: vegetable-tanned, 3 to 4 oz, one clean piece with no brand marks or scars.
  • Template: a sheet of card stock, a pencil, and one real payment card.
  • Cutting: a sharp craft knife, a steel rule, a poly cutting board.
  • Marking and holes: a wing divider or scratch awl, a stitch groover, a 1/8″ flat stitching chisel set with a 2-prong, and a mallet.
  • Stitching: two harness needles, waxed polyester or waxed linen thread, a stitching pony, and double-sided leather tape or rubber cement.
  • Edges: a size 0 edge beveler, 120 and 240 grit sandpaper, gum tragacanth or water, a wood slicker.

Most of that list comes straight from the two tutorials. Weaver’s minimal card wallet walkthrough uses the size 0 Master Tool beveler, the 1/8″ flat chisels, double-sided tape and a stitching pony. Makesupply’s list adds rubber cement, binder clips, 110-lb card stock and the two sandpaper grits.

A word on bridle. People ask whether they can make this in English bridle, and the answer is yes if it’s thin enough. Most bridle comes thick. I thin strap leather on an old hand-crank splitter before I stitch it, and the post on skiving and splitting covers why that’s harder than it looks. Without a splitter, buy thin veg tan and leave the bridle for the briefcase.

Sizing it from the card

Measure the card, not a pattern you found. Then add room.

A payment card follows the ID-1 size in the ISO/IEC 7810 standard. CardLogix, a smart card maker, gives the CR80 size as 3.375 by 2.125 inches, which is 85.6 by 54 mm, at a standard thickness of 30 mil, or 0.76 mm. The ISO/IEC 7810 entry on Wikipedia lists the same card as ID-1 and names the cards that use it: credit and debit cards, many driving licences, transit cards.

That last number is the one beginners forget. Four cards stack to roughly three millimetres, and a pocket cut snug to one card won’t take four.

Here’s a starting point, worked out from the card and nothing else. Lay the card flat with its long side running toward the fold. The inside of the pocket, from the fold to the stitch line, wants to be the card’s length plus about a quarter inch of ease. Put the stitch line an eighth of an inch in from the cut edge on the bottom and the open side. That gives a finished piece of roughly 3-7/8 by 2-5/8 inches, so a blank about 7-3/4 inches long by 2-5/8 inches high, folded at the middle.

Test it in card stock before you touch the leather. Fold the paper, tape the bottom and side where the seam will run, and slide in the cards you’ll really carry.

Weaver did something similar for its other card wallet, cutting the body slightly wider than a 3-1/2″ business card so the leather has room to stretch. Leather does stretch. It doesn’t shrink back.

A thumb notch, if you want one, is a shallow half-circle cut into the top edge of the front face only. It costs ten seconds with a punch or a knife and saves a thousand small fights with a tight pocket.

The reversal: I don’t use templates

Rulers and my eye on a briefcase. Card stock on this. Both are true.

Hands saddle stitching the corner of a leather card wallet seam held in a stitching pony.

I don’t work from templates on my own pieces. I use a rule and my eye, and I’ve built briefcases that way for years. A template, to me, is something a factory needs.

So here’s the honest part. On a card wallet I’d tell you to make the template anyway.

A briefcase is big. A sixteenth of an inch of drift on a gusset gets taken up by the leather, by the stitching, by the way the case settles once it’s loaded. A card wallet has no slack in it anywhere. The pocket is one card wide plus a hair, the seam is an eighth of an inch from the edge, and if the stitch line wanders the cards either rattle around or won’t go in at all. The eye that cuts a briefcase panel fine is the same eye that cuts a card pocket a sixteenth too tight, and you won’t know until the thread is pulled and there’s no fixing it.

My opinion: the smaller the piece, the more the paper earns its place. That doesn’t make me a template man.

It makes me a man who knows what a stitch line costs to pick out, and would rather spend ten minutes with paper and tape.

Weaver’s walkthrough lists the same thing among the common errors: keep the stitch spacing even, and don’t clip the top of a pocket with the chisel. Both happen when nobody measured first.

Cutting, marking and punching

One cut per edge, one stitch line, and every hole lined up through both layers.

Trace the template onto the grain side and cut on the poly board with the rule held down flat. One stroke where the leather lets you, two where it doesn’t. A sawed edge means extra sanding later, and on a piece this size the sanding shows.

Round the two outside corners on the open side so they don’t catch a pocket lining. Weaver rounds its corners with three small cuts each, then cleans them.

Mark the fold line on the flesh side and score the stitch line with the groover on the grain side, an eighth of an inch in, along what will become the bottom and the open side. Leave the fold side alone. Bevel the top edge of both faces now, while you can still reach it easily, because the mouth of the pocket is the edge a thumb rubs every day.

Fold the piece and stick the two layers together along the seam only, with tape or a thin line of cement. Keep the glue out of the pocket.

Then punch. Run the flat chisel through both layers at once, on the groove. Front and back line up that way. On thick work I pre-punch and line up every hole before a needle goes near it, because thick leather won’t stitch any other way. This leather is thin, but the habit holds: holes punched through both layers together, never one layer and then a guess at the other. At the corner where the bottom turns up the side, step down to the 2-prong and the single prong so a hole lands right on the turn. Weaver does exactly that at its corners. The post on punching stitch holes covers keeping the chisel square, which matters even more when the line is short.

On my hand stitching page I wrote that hand-punched holes tend to run a little bigger, and why: “The hand is limited to how small it can get, especially with thick bridle saddlery leather.” Thin leather lets you go finer. Take it.

One seam, stitched by hand

Start at the mouth. Finish at the mouth’s opposite end. Backstitch where it pulls.

Macro view of the fold and the burnished stitched edge of a one-seam leather card wallet.

I hand saddle-stitch everything. I gave up sewing machines a long time ago, and a seam this short is no reason to dig one out.

Tandy’s saddle stitching guide gives the rule for thread: cut about five times the length of the run you’re stitching, because running short is worse than having thread left over. Put a needle on each end. Clamp the wallet in the pony with the seam up. Pass one needle through the first hole and center the thread, then take both needles through every hole after it, one from each side, with the same pull on both. Tandy’s instruction is to keep the thread at “equal lengths on each side of the stitch” and to lock each stitch by casting the thread over the second needle.

My opinion on where to start: at the top of the open side, right at the mouth of the pocket. That’s the hole that takes the strain every time a card goes in or out. Backstitch two or three holes there, the way Tandy describes, by going back through the holes you’ve already sewn. Then run the seam down the side, around the corner hole, and along the bottom to the fold. Backstitch again where the seam meets the fold.

Pull every stitch the same. The stitch count post gets into why spacing and tension tell you more about a maker than the number of stitches per inch does.

Finish poly thread by trimming close and melting the ends with a lighter, keeping the flame off the leather. With linen, Tandy suggests a drop of glue tapped in with a needle. Tap the seam flat with a smooth hammer to set it in the groove.

Edges, and the one place it fails

The seam edge gets sanded and slicked. The fold gets watched.

Now the edges. Bevel the seam edge on both faces, sand it flat through both layers until the glue line disappears, dampen it, rub in gum tragacanth and run the slicker hard and fast until it goes dark and quits feeling rough under a thumbnail. The post on hand burnishing covers that rub in full. On this piece the edge is short, so do it twice.

Montana Leather Company’s beginner wallet guide builds its cardholder from two rectangles, stitched along the sides and bottom and burnished after. That’s three seams and two pieces. It’s a fine design. It just doesn’t have a fold to worry about.

The fold is the weak point of this one, and nobody makes a fuss about it. There’s no stitch there to fail, which sounds like good news. What’s there instead is leather bent hard on itself, in the same place, every time the wallet goes in and out of a pocket. Thin veg tan takes that well. Thick or dry leather fights it, and the grain on the outside of the bend is where it shows first. That’s my opinion from handling folded leather, not a test I can point to.

Keep it fed. My Leather Care page gives the routine: conditioner on a clean cloth, rub it in, let it sit, buff off the rest. The post on caring for a wallet starts with what you carry in it, which on a card wallet is most of the wear.

Choose the leather by the weight and character you want it to have in five years, not the color you like this week. One seam, one fold, and a pocket you’ll reach into a few thousand times. Every one of those times the fold bends and the mouth of the seam takes the pull.

12-Inch Stainless Steel Metal Ruler with Non-Slip Cork Backing: A 12-inch stainless steel ruler with a non-slip cork back. See it on Amazon (affiliate link).

X-ACTO #1 Z-Series Precision Utility Knife: A precision craft knife for fine cutting. See it on Amazon (affiliate link).

General Tools Scratch Awl with Hardwood Handle: A scratch awl with a hardwood handle. See it on Amazon (affiliate link).

Jmuiiu 7-in-1 Adjustable Leather Groover: An adjustable stitching groover for cutting a channel along the stitch line. See it on Amazon (affiliate link).

Weaver Leather Supply Diamond Leather Stitching Chisel Set: A set of 4 mm diamond stitching chisels for punching saddle-stitch holes. See it on Amazon (affiliate link).

Mandala Crafts 150D 0.8mm Black Flat Waxed Thread: A flat waxed polyester thread, 0.8 mm, in black, for hand sewing leather. See it on Amazon (affiliate link).

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