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American Briefcase Maker

Leather Coasters

LeatherCraft, From the Bench, Projects / Leather Coasters
Four hand-stitched vegetable-tanned leather coasters stacked on a wooden workbench beside edge tools.
Peter Joeseph 'Briefcase Maker' Kalafatis November 10, 2026 0 Comments

Four rounds of veg-tan and a backing. Then a sweating glass sits on them all summer.

Leather coasters are rounds or squares of firm vegetable-tanned leather, cut, edged and sometimes stitched to a backing, and they’re about the only thing a leatherworker makes whose whole job is to get wet and hot on purpose. That’s the joke in the project. Veg-tan hates standing water and it doesn’t love heat, and here you are cutting four pieces of it so people can set a cold beer or a fresh coffee on top. Make them anyway. A coaster teaches cutting, edges and finish on a piece small enough to throw away, and the leather comes off the part of the hide you were going to throw away in the first place.

Video: Your First Leathercraft Project // Leather Craft 101 // EP05 Coaster Project & FREE Patterns, from J.H.Leather on YouTube.

That’s J.H.Leather’s beginner coaster from start to finish, the same video QEST runs on its Leathercraft 101 page as a first project, with a free pattern. Watch it once for the motions. What follows is the materials, the order, and the argument about water I lose halfway through.

The materials list

Thick leather if it stands alone, thin leather if it sits on something.

Hands tracing a circle template onto a leather offcut to cut matching leather coasters.

There are two honest ways to build one, and they want different weights.

The single-layer coaster is one heavy disc. Brettuns Village sells 4-inch vegetable-tanned coaster blanks at about 8 to 9 oz, which it compares to belting leather and puts at a little over 1/8 inch. That’s the weight I’d cut to if I wanted a coaster that lies flat on its own and doesn’t curl at the edge after a wet night.

The layered coaster is a thin face on a firm base. Sailrite’s DIY leather coasters glue 2 to 3 oz chrome-tanned leather on top of a 4 to 5 oz veg-tan panel, the base giving the thickness and stiffness. Sew4Home’s leather and felt coasters go lighter still, leather up to about 4 oz over heavy wool felt, and the felt is there because it makes the coaster “safe for any surface.” Blick’s custom leather coasters skip the felt and glue the leather to store-bought cork coasters.

  • Leather: veg-tan at 8 to 9 oz for single layer, or 4 to 5 oz under a thin face.
  • Backing: cork blanks or wool felt, if layered.
  • Glue: contact cement, water-resistant if the coaster will see spills.
  • Cutting: a sharp knife or rotary cutter, a straightedge or circle template, a cutting mat.
  • Edges: beveler, fine sandpaper, gum tragacanth or water, a wooden slicker or canvas.
  • Stitching, optional: wing divider, stitching chisel or awl, two harness needles, waxed thread.
  • Finish: an acrylic top finish, or conditioner, or nothing. More on that later.

Where the leather comes from matters. For briefcases I only use the bend, the tight butt of the hide. The belly goes in the trash. The shoulder is for small parts, and in my opinion a coaster is the smallest part there is, so this is a shoulder job. Spend the bend on something that carries weight.

Cutting four that match

A coaster set gets judged as a set. One crooked round and all four look wrong.

Make one template and cut everything from it. A disc of card or a jar lid works for rounds, and a square drawn once on stiff card, checked with a square rule, works for the other shape. Trace on the grain side so you can see the scars you’re dodging, and lay the template on clean leather, not on a brand or a vein you’ll have to stare at under a glass for ten years.

Sailrite cuts its squares a little oversized from both layers, glues them, presses them with a roller, and only then trims to final size with a square ruler. That’s the right order for anything layered. Two pieces of leather never line up perfectly by hand, and trimming after the glue means the edge is one clean wall instead of a step.

For rounds, a straight blade fights you. Go slow, move the leather under the knife rather than twisting your wrist, and make light passes. Cut squares and round the corners afterward; Sailrite rounds its four corners with a utility knife or a corner punch and sands them smooth.

Then stack the four and look at them edge-on. The one that sticks out gets trimmed, and you keep trimming until the stack reads as a single block of leather.

Gluing, stitching and the edge

Glue holds the layers. Thread holds the glue. The edge is what people touch.

Macro of a layered leather coaster edge showing the leather face, veg-tan base and cork backing.

On a layered coaster, coat both faces with contact cement, wait until it’s tacky, and press from the middle out in one go. Sailrite puts water-resistant cement on the back of the face and the grain side of the base. That’s a detail worth copying, because a coaster is the one place in leatherwork where the glue line will sit in water.

Stitching is optional. Glue alone will hold a coaster on a coffee table. But I hand saddle-stitch everything, and in my view a stitched coaster earns its keep the first time a cheap glue line lets go along one side. Sailrite marks its stitch line about 1/8 inch in from the edge with a wing divider and runs the thread around the whole perimeter, going back over the first two stitches to lock it, then burning the tails.

Bevel next. Sailrite bevels only the veg-tan base with a narrow edger, leaving the soft chrome face alone, because soft leather doesn’t take a bevel cleanly.

Then the edge itself. Sand it flat. Wet it, or put on gum tragacanth with a fingertip the way Sailrite does, and rub with a wooden slicker or a scrap of canvas until the fibers lie down and the edge goes dark and hard. The piece on burnished edges covers why that hard edge matters on a case. On a coaster it matters more. In my view water gets in at the edge first, and a fuzzy edge drinks like a wick.

Dye goes on before finish, if you want color. Natural veg-tan darkens with use anyway, and the post on hand-dyeing veg-tan black is the place to start if you’d rather pick the color than wait for one.

What water and heat do to veg-tan

Two enemies, and the coaster sits between them.

Water first. Tanner Bates, a UK maker, says on its page about wet leather and stains that veg-tan is more porous than chrome-tanned leather, and that drying droplets leave mineral deposits behind as marks. On my leather care page I wrote that no conditioner is waterproof. Wax will make water bead, but water that sits will get in and leave a spot, so wipe it off. The spots fade as the leather patinas and the dye settles. A glass of ice water sweating on a coaster for an hour is exactly the water that sits.

Heat second. The Leather Dictionary’s entry on shrinkage puts the shrink point of veg-tan at roughly 70 to 80°C, lower than chrome-tanned, and says wet leather shrinks at much lower temperatures than dry. Now the drink. A review in the Journal of Food Science by Abraham and Diller, on hot beverage temperatures, gives coffee going into the cup at 83 to 86°C. The bottom of a mug runs cooler than what’s inside it. Still. Put a mug fresh off the pot on a coaster that’s already damp from the last glass, and you’ve got wet veg-tan under heat, which is how leather shrinks, cups and goes hard as a cracker.

Tanner Bates sells its own veg-tan coaster with Workshop Coffee and says up front it will take marks over time, “especially from exposure to moisture or heat.” That’s a maker being straight about his own product before the customer finds out. I respect it.

Sealed or bare

Here’s my case for bare leather. Then here’s why I’d lose it.

A cold glass on a used vegetable-tanned leather coaster showing a faint water ring.

There are three finishes on the table. Fiebing’s Resolene is an acrylic top coat the maker calls a “flexible, durable, water resistant” finish, with a medium to high gloss. Sailrite lists it as optional on its coasters and skips it, because its chrome-tanned face is already water resistant. Blick sprays two to three coats of clear gloss over painted leather to make it waterproof. Sew4Home says unfinished scraps need a finish added so the coasters repel water.

The third option is nothing but feed. I condition with beef tallow and leather oil, and on undyed veg-tan, sun and oil both push the patina along faster. So my case goes like this, and it’s my opinion: leave a coaster bare, give it tallow, and let every ring and drip go into the leather. A sealed coaster looks the same in year five as it did on day one. A bare one keeps a record of every glass anyone ever set down on it. On a briefcase I’d call that patina. On a coaster it’s the same thing. The piece on water spots in bridle makes the case that most of them fade with time and handling.

Now the turn.

A coaster isn’t a briefcase. A briefcase meets rain now and then. A coaster meets water every single day, it’s the whole job, and a tide line that would be character on a flap is just a stain under a glass. Worse, in my view, bare leather doesn’t only mark. Soak it enough and the water goes through to whatever wood is underneath, which is the one thing a coaster is supposed to stop. A rainy commute is weather. A wet glass on a coffee table, every night, is a drip pipe.

So if I’m honest, the best material for keeping water off a table is the cork disc Blick glues its leather to. The leather on top is for the hand and the eye. Seal the face if the coasters are going to work hard, put cork or felt underneath, and keep the bare, tallowed set for the desk, where a cup of coffee sits now and then and nobody minds a ring. That’s the version that belongs in a leather home office, next to a desk pad that’s taking marks the same way.

Living with them

Wipe, dry flat, feed now and then. And stop worrying about the rings.

Wipe a wet coaster with a dry cloth and let it dry flat, away from a radiator or a sunny sill, because heat on wet veg-tan is the thing that cups it. Tanner Bates also warns against direct heat like a hairdryer. If a bare coaster starts to curl, my opinion is the fix is weight, not heat: a book on top while it’s still slightly damp, and patience while it dries the rest of the way.

Feed a bare set when it looks pale and dry. Thin coat, rub it in, buff it off, the same way I’d treat any veg-tan. A sealed set needs less, though no finish lasts forever under a glass, and a top coat that’s worn through in the middle is a sign to strip and redo it or let that coaster go bare.

Dream Green DIY’s no-cost version is a circle cut out of a leather sample with scissors and set suede side down, with no lining, because the suede grips the table. No edges, no stitching, no finish. It won’t last like a stitched, burnished set. It’ll still do the job for a while, and if you’ve got nothing in front of you but a few leather samples and a mug to trace around, that’s how this project starts.

A set of four makes a decent gift, too, if the person on the other end doesn’t mind leather that changes; there are a few more ideas along those lines in the list of leather anniversary gifts. Hand them over bare and tell them about the rings before they find the first one.

100 PCS Cork Coasters: A pack of 100 cork coaster blanks. See it on Amazon (affiliate link).

Barge All Purpose Cement, Quart: A quart of solvent-based contact cement. See it on Amazon (affiliate link).

OLFA 45mm Ergonomic Squeeze-Handle Rotary Cutter: A 45 mm rotary cutter with an auto-retracting blade. See it on Amazon (affiliate link).

Fiskars 18 x 24 Inch Self-Healing Cutting Mat: A self-healing cutting mat, 18 by 24 inches. See it on Amazon (affiliate link).

IRWIN Carpenter Square, Steel, 8-Inch by 12-Inch: A steel carpenter square, 8 by 12 inches, for checking right angles. See it on Amazon (affiliate link).

WORKPRO 18mm Retractable Utility Knife: An 18 mm retractable utility knife with snap-off blades. See it on Amazon (affiliate link).

As an Amazon Associate I earn from qualifying purchases. A commission may be earned if you buy through this link, at no extra cost to you.

Sources

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