Leather Sweatband Sizes: How to Measure a Hat and Pick the Right Band

The most common question we get about leather sweatbands is not the colour or the leather, it is the size. Here is how sweatband length relates to hat size, how to measure a hat that has lost its band, and when it is worth ordering a band already sewn to size.

Sweatband length versus hat size

A hat size is the circumference of the head in inches divided by pi, so a size 7 hat has an inside circumference of about 22 inches and a 7 5/8 about 24 inches. A sweatband is cut longer than the circumference so the two ends overlap at the back, typically by about one inch. That is why a stock 25 inch band, regular or full grain, covers everything from a 6 7/8 up to about 7 5/8: you cut it to the crown and join the ends. Sizes above that need a longer band, which is why we stock an XXXL length for 7 3/4 and up.

How to measure a hat with no sweatband

Take a flexible tape or a strip of paper and run it around the inside of the crown where the old band sat, just above the brim. Note the length, add one inch for the overlap, and that is the band length you need. If the hat has stretched or shrunk over the years, measure the head it is meant to fit instead and use the hat size table above.

Width and thickness

Our bands are about 1.75 inches (4.2 cm) wide and 1.2 mm thick. That width folds cleanly and gives the crown a firm base without eating into the height of a low crown. Thinner leather curls; thicker leather is hard to stitch and stiff on the forehead.

Reeded edge and colours

Every band is reeded: a synthetic wire sewn into the bottom edge keeps the band firm and the hat sitting level, and it is what hat makers ask for on fedoras and western hats. Colours run from natural, nude and khaki through coffee, chestnut and chocolate to black, navy, red and the speciality colours, all in the same lengths.

When to order sewn to size

If you would rather not cut and join the ends, order a sewn-to-size leather sweatband. Tell us the hat size, the band arrives closed to that size with the seam at the back, and it drops straight into the crown. It costs a little more than a stock band and saves twenty minutes at the bench, which is why hat shops doing repairs use them.

Finishing the job

Add a ferrule to join the wire if your band is reeded, a small bow to cover the back seam, and a satin liner to close the interior. The full range of leather sweatbands for hats is on the site, sold by the piece or in bulk for hat makers. Ten thousand orders and more than 2,500 reviews at 4.9 stars on Etsy, most of them about fit, are the best proof we can offer that the sizing works. If the hat you already own is a little too tight or too loose, the fit guide explains what actually fixes it and what ruins the hat. For practice pieces and working hats, the guide to leather sweatband seconds explains the mixed bundles we sell below cost. If the hat you are sizing for is a western one, see our guide to cowboy hat sweatband replacement.

Hat band or sweatband? They are not the same part

Type "leather hat band" into a search box and you get two different things, and the wrong one arrives in the post more often than you would think. A hat band is the trim you see on the outside: a ribbon, a braided cord or a strip of leather sitting in the crease where the crown meets the brim, often with a buckle or a concho on a western hat. It changes the look of the hat and nothing else. It does not touch your head and it has no effect on fit. We do not make outer hat bands; our range is the inside of the hat.

The sweatband is the leather band sewn inside the crown at the base. It touches your forehead all day, so it takes the sweat and the oils, and it is what gives the hat its fit and holds the crown in shape. If the hat feels rough on the forehead, has gone salt stained, or has stretched so it drops over the ears, the sweatband is the part to replace.

Roan, sheepskin, and what the old word means

Ask an old hatter what the band inside a hat is made of and the answer is roan. Roan is the trade name for sheepskin leather tanned soft and thin, and in hatting it has meant the sweatband for well over a century. Vintage catalogues list a roan sweat as a mark of quality. Search for a roan leather sweatband today and you find the same thing under a plainer name: a sheepskin leather sweatband.

Sheepskin suits the job for four reasons. A sweatband sits against the forehead for hours, must bend around a tight curve without cracking, must take sweat and give it back without going hard, and must be thin enough to sew through by hand. Sheepskin does all four: naturally soft, so the band moulds to the head within a few wearings; a grain tight enough to keep sweat off the felt; and at about 1.2 mm it sews easily with a glover's needle and waxed thread. Heavier hides are more durable on paper but stiff in the hat, and a stiff band is what leaves the red line on the forehead.

Full grain or regular?

Our full grain bands are sheepskin in the traditional sense: full grain, soft and conforming, lightly distressed so the natural marks of the hide show, and 1.2 mm thick. They are reeded, with the two ends of the reed joined by one ferrule, and cut to 25 inches so a single band covers 6 7/8 to about 7 5/8. Colours include black, coffee and navy. They cost a little more, and they are the ones to choose for a hat that will be worn every day, for a restoration where the original band was roan, and for makers who want the interior to match the quality of the felt.

Alongside them we stock regular quality bands in the same 25 inch length and 1.2 mm thickness, in chestnut, chocolate, red and nude. They are reeded and sewn in the same way and take the same ferrule and bow. For a shop doing volume repairs, for a costume or occasional hat, or for a first attempt at sewing a band by hand, they are the practical choice.

Pick full grain when the hat is good, the wearer is fussy, or the band will be seen and felt every day. Pick regular when the budget matters more than the hand feel, or when you are fitting several hats at once. Either way the measuring and sewing are identical.

Choosing the colour

Black is the band most hat makers keep in quantity, because it pairs with every felt colour and every liner. If a shop stocks one colour, it is this one: it disappears inside a black or charcoal hat and frames a printed liner inside a lighter one.

For brown felts there are three. Coffee is a rich mid brown that sits well in tan, chocolate and black felts. Chestnut is warmer and suits brown, camel and olive hats, and blends in behind almost any liner. Chocolate is the darkest of the three and pairs well with brown, tan and gold satin liners. For a western hat in earth tones, one of those three is usually the right answer.

For straw and light felts, khaki is a light warm tan that suits sand and silverbelly, and nude is lighter still: it disappears inside a light felt or straw hat and lets a printed liner do the talking.

For a statement, navy is a quiet alternative to black inside a grey or blue hat; red is the classic inside a black or grey fedora and it is the softest leather we carry; burgundy sits beautifully in a black or grey fedora with a gold piped liner; and sunshine yellow brings a straw or ivory hat to life.

Finishes: extra fine reed and rustic distressed

The standard band has a reeded top edge. An extra fine reed gives a slimmer, neater edge for a dress fedora, where a bulkier reed would show. An extreme rustic distressed finish, sold in sets of two coffee and two khaki, keeps the scars and grain of the hide as part of the design rather than grading them out. For big heads the XXXL band comes in coffee at about 26.4 to 26.8 inches.

Seconds: what they are and when to use them

Every workshop that makes leather sweatbands ends up with a pile it will not sell at full price: a scuff on the grain, a mark from the cutting table, an edge that wandered a millimetre, a colour that came out a shade off. Nothing wrong with how they work. A second is a finished band with a cosmetic flaw, and ours are the same reeded bands as the regular stock, zigzag stitched, with the synthetic wire reed, cut to about 25 inches (63.5 cm) and about 1.75 inches (4.2 to 4.5 cm) wide. The mix includes full grain as well as standard quality leather; both are real leather and both are ready to sew in.

Bundles are 10, 25 or 50 bands, and the colours are picked at random from black, tan, chestnut, cream and burgundy, so no two bundles are the same. Widths, thicknesses and leather types vary slightly within a bundle. They are sold as-is and priced below our regular stock: 10 for $45, 25 for $99, 50 for $185, which is below our cost.

Seconds are the right choice for practice, because the first few bands you sew in will not be your best work and there is no sense spending good stock on them. They suit repairs on working hats, where a ranch hat or a hat that lives in a truck needs a sound band rather than a flawless one. They suit bulk restoration, where a shop brings a dozen thrift-store hats back to wearable. And they suit any band that sits behind a liner in a hat nobody turns over.

Use regular stock instead for a customer's dress hat, a new build you are selling, or a colour-matched restoration where the band will show at the brim edge, because there you need to pick the colour and the grade.