Dress Shirt Fit: Getting the Collar and Cuff Right

A dress shirt fits when you can button the collar with two fingers of room, the cuff stays put on your wrist without pinching, and the sleeve ends at the wrist bone so that a bit of shirt shows beneath a jacket. Those two measurements, neck and sleeve, are the ones printed on traditional shirt labels, and they are the easiest to get wrong when you buy online. This guide shows how to measure them, how to check the fit in the mirror, and how to choose the collar and cuff style that suits your face, your tie and the formality of the occasion.

How a dress shirt collar should fit

Button the top button and put your fingers between the collar and your neck. Two fingers should slide in comfortably. One finger is a slim, sharper fit that suits a tie tied tightly; three is loose enough that the collar will gap and roll. Turn your head left and right. The collar should not dig in, and it should stay upright without the points curling away.

The collar band should touch the back of your neck all the way around and hold the tie knot in position. If the collar looks limp once buttoned, a collar stay may help, or the shirt is a size too big.

How to measure your neck size

1. Use a soft tape measure and wrap it around the base of your neck where a collar would sit, just below the Adam’s apple.
2. Keep the tape snug but not tight; you should be able to slide one finger under it.
3. Read the measurement in inches or centimetres and add about half an inch (1 to 1.5 cm) for comfort. That is your collar size.

A tape measure round the outside of an existing shirt’s collar, laid flat from the buttonhole to the centre of the button, is the other reliable method. Compare it with the size chart on the product page. Our guide to reading clothing size charts explains the difference between body measurements and garment measurements.

How the cuff should fit

A buttoned barrel cuff should sit at the wrist bone with room for one finger inside. If it is tighter, the cuff cuts into your wrist when you type; if it is looser, it slides over the hand. Many shirts offer two button positions to fine-tune the fit. If you wear a watch, choose the looser position so that the cuff can move over the case without catching.

The balance is fine: loose enough to pass over a watch case, tight enough that it cannot slip down over the back of your hand. That is why a shirt sometimes fits well everywhere except at the wrist, and why the button position matters.

Sleeve length: the number people forget

Traditional shirt sizes list the collar and then the sleeve, for example 15.5 / 34-35. The sleeve number is measured from the centre back of the neck across the shoulder to the wrist bone. When your arm hangs, the cuff should finish at the base of your thumb or slightly above it, and when you wear a jacket the cuff should extend a quarter to half an inch past the jacket sleeve, as described in our suit jacket fit guide.

Lift your arms. If the cuff climbs several inches up your forearm, the sleeve is too short or the body too tight. Too long and the sleeve bunches into a pile at the wrist.

To measure sleeve length

Have someone measure from the middle of the back of your neck, over your shoulder point, down your slightly bent arm to the wrist bone. Doing it alone is difficult, so an existing shirt that fits is a better reference: lay it flat and measure from the centre of the collar back, along the shoulder seam, to the end of the cuff.

The rest of the shirt: shoulders, chest, body and length

• Shoulders: the seam should sit on the shoulder edge. If it drops down the arm, the shirt is too big.
• Chest: buttons should not pull into horizontal wrinkles when you sit or reach forward. A slim fit leaves only a small fold of spare fabric at each side; a classic fit leaves a little more.
• Body taper: a tapered shirt reduces fabric at the waist for a cleaner line under a jacket. If you will wear the shirt tucked, this helps a lot.
• Length: a tucked shirt should be long enough to stay in when you sit and raise your arms; an untucked shirt should finish around the middle of your seat.

Match the collar style to your face and tie

A collar style changes the fit and formality of the shirt as well as the shape it frames:

• Spread collar: the points are wide apart. It suits larger tie knots and longer or narrower faces, because the wide spread adds visual width.
• Point (straight) collar: the points sit closer together. It is the traditional option, works best with a slimmer knot, and its longer, closer points help lengthen a round face.
• Cutaway collar: an extreme spread that makes a bold statement, best for more fashion-forward suits.
• Button-down collar: the points fasten to the shirt. It is a less formal collar for oxford cloth and it works well with a blazer or knit tie. See our note on tie width and knots for which knots suit each collar.

Cuff styles

• Barrel cuff (single): one or two buttons. The everyday option.
• Convertible cuff: can be fastened with a button or with cufflinks.
• French cuff: folded back and fastened with cufflinks, the more formal choice. See when to wear French cuff shirts.

Common fit mistakes

• Choosing a shirt by chest size alone and ignoring the neck.
• Buying “slim” because it looks modern, then finding the sleeves too tight in the upper arm.
• Not allowing for shrinkage. Cotton shirts can shrink slightly on first wash; check the care label and product page.
• Wearing the collar too loose. A shirt that looks fine open will look sloppy when a tie is added.
• Sleeves that are too long, hiding the watch and bunching under the jacket.

Buying dress shirts online

Because collar sizes often come in half-inch steps, use your neck and sleeve measurements rather than a general “M” or “L”. If you fall between two sizes, choose the larger collar and have the sleeve adjusted, or choose the shirt that matches the more visible number. Eligible unworn items with tags can be returned within 30 days of delivery, and the delivery and return details are on our shipping and returns page.

Dress shirt collar and cuff fit FAQ

How tight should a dress shirt collar be?

Snug enough that it holds a tie knot in place, loose enough that you can slide two fingers inside when fastened. If the button pops open or you feel pressure when turning your head, go up half a size.

Should the cuff show below the jacket sleeve?

Yes, by around a quarter to half an inch. It frames the wrist, and it protects the sleeve lining from wear.

What does 15.5 / 34-35 mean on a shirt?

The first number is the collar size in inches and the second is the sleeve length range. A 15.5 collar with a 34-35 sleeve fits a neck about 15 inches in circumference, plus allowance for comfort, and an arm that measures between those two sleeve lengths.

Can a tailor fix a shirt that fits badly in the neck?

Adjusting the collar is difficult because the collar band, collar and yoke are all connected, and most tailors will only do it if the shirt is expensive. Sleeves and body taper are routine alterations, so choose the shirt for its neck and shoulder fit first.

To compare styles, start with the men’s dress shirts at ADDMPS, take your neck and sleeve measurements, and check them against each size chart before you order.

Edited by the ADDMPS Style Team.