The size on a vintage label is a rumour. It might have been accurate in the year the garment was made, under a sizing system that no longer exists, before forty years of washing, stretching and the occasional tailor's adjustment. A men's large from the seventies, a women's eight from the eighties and an XL from the late nineties can all fit the same person, or none of them might. The only language that every piece of clothing speaks reliably is measurement.
Learning to measure vintage clothing properly takes about ten minutes and saves you a remarkable amount of disappointment, especially when you buy vintage online and cannot try anything on. It also makes you a better shopper in person, because you start to see a garment's proportions rather than its label. This guide walks through each measurement, how to take it, what it tells you and how to compare it with clothes you already own.
01. What you need, and how to lay a garment flat
You need very little: a soft tailor's tape measure, a flat surface large enough for the garment, and somewhere to write the numbers down. A metal tape will do in a pinch, but it does not follow curves well. Pick one unit and stick to it. Many vintage sellers use inches, many Canadian shoppers think in centimetres, and the worst mistakes happen when the two get mixed. If you need to convert, one inch is two and a half centimetres, close enough for clothing.
Lay the garment face up on a table or the floor, buttoned or zipped closed. Smooth it gently with your hands from the centre outwards so there are no wrinkles or folds, but do not stretch it. Knit fabrics, like tees and sweatshirts, are particularly easy to pull out of shape without noticing. The goal is for the garment to sit the way it would hang naturally, just flattened.
Be consistent. The same garment can measure differently depending on how hard you pull the tape and where exactly you start. Every measurement below describes a starting point and an end point. Use them every time, on your own clothes and on anything you are considering, and the numbers will be comparable.
02. Pit to pit: the measurement that matters most
For any top, from tees to parkas, pit to pit is the single most useful number. With the garment flat and closed, measure straight across the chest from the bottom of one armhole seam to the bottom of the other. Keep the tape horizontal and pull it just taut enough to be straight.
The result is half the chest circumference of the garment, not your body. A pit to pit of 55 centimetres means the garment measures about 110 centimetres around the chest. That number includes the ease, the extra room a garment needs to move with you, so it will always be larger than your own chest measurement. That is why comparing to a garment you already like is so much more useful than comparing to your body.
Two complications are worth knowing. On jackets with a lot of shape, like tailored blazers, pit to pit can vary depending on whether the garment is buttoned. Measure it closed. On garments with raglan sleeves, the armhole seam runs diagonally to the collar, so look for the point where the seam meets the side seam under the arm and start from there.
03. Length, and where to start it
Body length tells you where a top will end on you, which affects proportions more than almost anything else. There are two common ways to measure it, and sellers do not always say which one they used.
- From the high point of the shoulder. Start where the shoulder seam meets the collar and measure straight down to the hem. This is common for tees, shirts and sweatshirts.
- From the centre back. Start at the base of the collar seam at the middle of the back and measure down to the hem. Often used for jackets and coats.
The two methods can differ by a few centimetres, so pick one for your own clothes and, when you buy online, check which one the seller uses or ask. If a shirt has a curved hem, measure to the lowest point at the back. If a sweatshirt has a ribbed waistband that pulls in, measure the length with the band relaxed rather than stretched flat.
Length is also where vintage sportswear often surprises people. Many older sweatshirts and jackets are shorter in the body than modern equivalents, while nineties tees can be quite long. A sweatshirt with a generous pit to pit and a short length will give a boxy, cropped look; a narrow one with a long length will feel slim and elongated. Both numbers together describe the shape.
A label tells you what a garment was called. A tape measure tells you what it is.
04. Shoulders and sleeves
Shoulder width is measured across the back from one shoulder seam to the other, where the sleeve joins the body. It matters most for structured garments like shirts, blazers and jackets, where a shoulder that is too narrow pulls and one that is too wide droops. On casual pieces with dropped shoulders, the seam sits deliberately low on the arm, so this number will be larger than on a fitted garment, and that is part of the design.
Sleeve length can be measured in two ways. For garments with a set-in sleeve, measure from the shoulder seam along the top of the sleeve to the end of the cuff. For raglan sleeves, or when you want a figure that works across different shoulder styles, measure from the centre back of the collar, across the shoulder and down to the cuff. That second measurement is sometimes called the centre-back sleeve, and it is useful when comparing a drop-shoulder sweatshirt with a neater jacket.
If you often find vintage sleeves too long or too short, sleeve length is the number to watch. Many vintage team jackets and sweatshirts have long sleeves and tight ribbed cuffs, which hold a pushed-up sleeve in place. Tailored pieces with buttoned cuffs are less forgiving, though sleeves can often be shortened by a tailor.
05. Waist, hips and thighs
For trousers, jeans and skirts, start with the waist. Lay the garment flat, closed, and measure straight across the top of the waistband from one side to the other. Double the number for the full circumference. Vintage waistbands, especially on older denim, may have stretched or shrunk over the years, and many have been altered, so this measurement is often quite different from the size on the label.
Hips are measured across the widest part of the seat, usually around where the bottom of the fly sits on trousers. Thighs are measured straight across one leg, just below the crotch seam. These two numbers matter more than people expect. A pair of jeans can close at the waist and still be uncomfortably tight across the seat or thighs, particularly with older, rigid denim and high-rise cuts.
For a quick sense of leg shape, add the knee and the leg opening. Measure across the leg at the knee, roughly halfway down the inseam, and straight across the bottom of the hem. A wide leg opening relative to the thigh means a straight or flared leg; a narrow one means a taper. Those numbers are much more reliable than labels like slim, straight or relaxed, which meant different things in different decades.
06. Rise and inseam
Rise is the distance from the crotch seam to the top of the waistband, and it decides where a pair of trousers sits on your body. Measure the front rise from the point where the crotch seams meet, up along the front seam to the top of the waistband. Some people also measure the back rise, from the same point up the back seam, which tells you how much room there is in the seat.
Vintage trousers often have a higher rise than modern ones. A front rise of around 30 centimetres or more usually sits at or near the natural waist; a much lower figure sits on the hips. If you are used to modern low- or mid-rise jeans, it is worth knowing your own preferred number, because a high-rise pair in your waist size will feel and look entirely different.
Inseam runs from the crotch seam down the inside of the leg to the bottom of the hem. Keep the tape along the seam rather than cutting across the leg. If the hem has been rolled or cuffed, measure to the fold and note how much fabric is turned up, since it can be let down. Inseam is one of the easiest measurements to adjust with a tailor, at least in the shortening direction, so a little extra length is less of a problem than too little.
07. Building your own reference card
All these numbers become useful only when you have something to compare them to. The best reference is not your body but your wardrobe. Pick the pieces that fit you best: a favourite tee, a sweatshirt, a jacket, a pair of jeans and a pair of trousers. Measure each one using the methods above and write the numbers down somewhere you can find them quickly, perhaps in a note on your phone.
A simple reference card might look like this:
- Favourite tee: pit to pit, length from high point of shoulder, sleeve from shoulder seam.
- Favourite sweatshirt: pit to pit, length, centre-back sleeve.
- Favourite jacket: pit to pit, shoulder width, length from centre back, sleeve.
- Favourite jeans: waist, front rise, thigh, inseam, leg opening.
- Favourite trousers: waist, hips, front rise, inseam.
Add a note about how each piece fits and how you like it. If your favourite sweatshirt is slightly oversized on purpose, write that down. If your jeans are a little long and you always cuff them, note it. Those details help you interpret a new measurement correctly rather than just matching numbers.
08. Comparing and deciding
When you look at a vintage piece, in a store or online, compare its numbers to the matching garment on your card. Small differences of one or two centimetres are rarely noticeable. Differences of four or five centimetres in pit to pit or waist will change the fit noticeably. Larger differences mean a very different look, which might be exactly what you want, or not.
Remember that fabric matters too. A sweatshirt with stretchy cotton-blend fleece will feel roomier than a rigid canvas jacket with the same pit to pit. Old denim with no stretch fits more firmly than modern jeans with elastane. Knits may relax with wear; rigid cotton may shrink a little in the first wash. Read the fabric content along with the numbers.
Finally, think about what can be changed. Hems, sleeve lengths and waists can often be adjusted. Shoulders, rises and body lengths are much harder to alter. If a piece is perfect in the shoulders and body but a little long in the sleeve, it is probably worth taking home. If the shoulders are wrong, no amount of tailoring is likely to fix it.
09. A ten-minute habit
The first time you measure your own clothes, it will feel fiddly. By the third time, it becomes automatic. Keep a soft tape measure in your bag when you go vintage shopping, and do not be shy about using it; good stores are used to it, and many already note measurements on their tags. Online, look for listings that include clear measurements, and ask for any that are missing before you buy.
Measurement turns vintage shopping from guesswork into a calm, informed decision. You will still fall for things that do not fit, because everyone does. But you will know quickly, move on without regret and recognise the right piece the moment its numbers line up with the clothes you already love.
