Should I buy a dress to fit my bust or my hips?

The bust, on anything with a fitted bodice, because a dress pattern is graded from the chest and the rest follows. A waist or hip that is too generous can be taken in for very little. A bodice that does not close cannot be fixed at all.

Which measurement matters most for a skirt?

It depends on the opening. A skirt with a fixed waistband is sized from the waist. One with a tie or elastic is sized from the hip, since the waist adjusts and the hip has to get through. A full or heavily pleated skirt is sized from the waist alone, because the hem has more than enough room.

What if I am between two sizes on different measurements?

Buy the size that fits the largest of your measurements relative to the chart, then have the excess taken in. Seam allowances on mass produced clothing are about 1cm, so letting a garment out is usually impossible while taking it in is quick and cheap.

Is shoulder width more important than chest size?

On anything structured or with a set sleeve, yes. A shoulder seam has to land on the bony point of your shoulder, and recutting an armhole costs more than most garments are worth. A tight chest is the wrong size; a wrong shoulder is the wrong garment.

Fit and sizing

Bust, waist or hip: which of your measurements actually decides the size

3 November 2026 · 5 min read

You have three numbers and a chart has three columns, and they rarely agree. Almost everybody is one size at the bust and another at the hip, which makes the chart look broken when it is actually incomplete: it does not tell you which of your numbers governs. The answer depends entirely on how the garment is built, and once you can read that from a photograph you stop guessing. One measurement decides the size. The other two decide whether you will want it altered.

A garment has to pass two separate tests

The first test is getting it on. The second is wearing it. These fail in different places and people only plan for the second.

Anything pulled on over the head or stepped into and pulled up has a fixed opening, and the widest part of your body that has to pass through that opening sets the minimum. A straight skirt with no zip has to clear the hip even if it is going to be worn at the waist. That is a hard limit and no amount of ease elsewhere helps.

Anything that opens, with a zip, buttons or a wrap, skips the first test entirely. For those, only the worn measurement matters, which is why a back zip dress can be cut much closer than a pull-on one.

Read the construction and the governing measurement falls out

A fitted bodice above the waist is sized from the bust, and the bust alone. That includes most dresses, because a dress pattern is graded from the chest down and the rest of the garment follows. If you fit the bust you can take in a waist cheaply. If you do not fit the bust, nothing else is relevant.

A fixed waistband, with no elastic and no tie, is sized from the waist and nothing else. A skirt with a tie, a drawstring or an elasticated back is effectively sized from the hip, because the waist will adjust to you and the hip has to get past the opening.

A shaped lower half governs from the hip: a pencil cut, a straight tube, anything that narrows below the seat. A piece that is close to the knee before it flares is a hip and thigh garment pretending to be a waist garment, and the hip number is the one to read.

A full skirt, a circle cut or heavy pleating governs from nothing below the waist at all. A deeply pleated skirt has so much hem circumference that your hip measurement is irrelevant, so the waistband is the only number that decides.

Shoulders, the one that overrides everything

On anything tailored, structured or with a set sleeve, the shoulder is the governing measurement regardless of your chest. A shoulder seam belongs at the bony point at the end of your shoulder. Half an inch of error reads as the wrong size and an inch reads as borrowed clothing.

This matters because it is the one dimension that cannot be fixed cheaply. Reworking a shoulder means taking the sleeve out, recutting the armhole and putting it back, which on an inexpensive garment costs more than the garment. A tight waist is an afternoon's work for a tailor. A wrong shoulder is a wrong garment.

The exception is anything deliberately cut with a dropped shoulder, which has no seam at your shoulder point to get wrong. A coat cut oversized on purpose is forgiving for exactly this reason, and on one of those the sleeve length becomes the number that matters instead.

Why you buy for the largest, and what you do about the rest

When your measurements straddle two sizes, buy the size that accommodates the largest of them relative to the chart. Excess fabric is a solvable problem and insufficient fabric is not.

The economics are one sided. Taking a side seam in is a short job at any alterations shop. Letting one out is usually impossible, because mass produced garments are sewn with a seam allowance of about 1cm and there is nothing there to release. Shortening a hem is cheap. Lengthening one is not possible at all.

The exception, again, is the shoulder. If sizing up for your bust puts the shoulder seam halfway down your upper arm on a structured piece, the whole garment is wrong and you should buy a different shape rather than a different size.

Dresses are harder than tops for a structural reason

A top has to fit one zone. A one piece dress has to fit three at once, in fixed proportion to each other, decided by a pattern cutter who had a particular body ratio in mind. If your waist to hip difference is larger or smaller than theirs, no size in the range will fit all three.

That is why dresses are the highest risk clothing purchase anywhere, and higher still from a shop with no returns. If you are between sizes on a fitted dress, the honest answer is to look at how it is built before you look at the chart. Gathering, ruching, a tie, a wrap or a loose waist means the dress is not asking your three numbers to agree.

A dress with a defined waist seam and a back zip is asking exactly that. A collared velvet dress is sized from the bust first, so if your bust and hip disagree, go with the bust and expect to want the waist taken in. We would rather tell you that before you order than after.

What to do with your three numbers before you buy

Write all three down in centimetres, note which one of them is furthest up the chart, and then look at the garment and decide which measurement governs it. Those two facts together are the decision.

Then check the ease. A woven garment with no stretch wants roughly 5cm more than your body measurement at the governing point before it is comfortable to sit down in. A knit with elastane can sit at your measurement or slightly under it. Velvet is bulkier than it looks and takes up a little more room than a flat woven of the same number.

If the product page does not give you the figure you need, email us before ordering and we will read the supplier's measurements for that exact item. We do not take returns for a size chosen wrongly, which makes a question asked beforehand the only thing that actually lowers your risk. It is free and it takes us a day at most.

Questions people actually ask

Should I buy a dress to fit my bust or my hips?: The bust, on anything with a fitted bodice, because a dress pattern is graded from the chest and the rest follows. A waist or hip that is too generous can be taken in for very little. A bodice that does not close cannot be fixed at all.
Which measurement matters most for a skirt?: It depends on the opening. A skirt with a fixed waistband is sized from the waist. One with a tie or elastic is sized from the hip, since the waist adjusts and the hip has to get through. A full or heavily pleated skirt is sized from the waist alone, because the hem has more than enough room.
What if I am between two sizes on different measurements?: Buy the size that fits the largest of your measurements relative to the chart, then have the excess taken in. Seam allowances on mass produced clothing are about 1cm, so letting a garment out is usually impossible while taking it in is quick and cheap.
Is shoulder width more important than chest size?: On anything structured or with a set sleeve, yes. A shoulder seam has to land on the bony point of your shoulder, and recutting an armhole costs more than most garments are worth. A tight chest is the wrong size; a wrong shoulder is the wrong garment.