Why Do My Bras Never Fit?

1. Your starting size is wrong

Many people have never had their size worked out from their own measurements without adjustment. Size guides that add four or five inches to the underbust produce a band that is too big and a cup that is too small, and research at the University of Portsmouth found that this happened to most of the women it tested.

If you start from the wrong size, moving a cup up or down in the same band never arrives anywhere good. The bras feel loose and tight at once: the band slides about and the cups dig in.

What to do: measure your underbust and bust and use them as they are. The calculator does this, and why the +4 method is wrong explains the background. Be ready for a smaller band and a larger cup letter than you are used to.

2. Your size is not on the rail

A typical high-street range is densest around 32 to 38 bands and A to E cups, and thins out quickly beyond that. If you are a 30F, a 28E or a 36H, you can try every bra in an ordinary shop and none will fit, because your size is not there. Staff may still put you in the nearest thing they have.

What to do: compare your measured size with what the shop stocks. If it is outside the range, go to a retailer that carries it. See where to buy bras in unusual sizes.

3. The shape is wrong, not the size

Two people with the same measurements can need different bras. If your breasts are wide and shallow, deep cups will gape. If they are narrow and stand well forward, shallow moulded cups will be pushed off your chest. If you are fuller on top, firm cup edges will cut in. If you are fuller below, the same cup will stand empty at the top.

The giveaway is a bra that is wrong in two opposite ways at once, for instance gaping at the top while the wire digs in below, or a size up being too big while a size down is too small.

What to do: work out your shape and choose cuts that suit it. Start with the breast shapes guide. If you have only ever worn moulded T-shirt bras, try an unlined, seamed bra in the same size. For many people that single change solves it.

4. You expect one size everywhere

There is no enforced sizing standard, and brands cut to their own patterns. Bands are firmer in some labels and stretchier in others. Cups are deeper, shallower, wider or narrower. Even within a brand, different styles fit differently.

What to do: treat your size as the place to start in each new brand, and take the neighbouring sizes into the fitting room. When a bra fits, write down the brand, the style name and the size. That record is more useful than a size on its own.

5. The bra is not being put on or judged properly

A bra can seem to fit when part of the breast is sitting outside the cup under the arm, and seem too big when it only needs the tissue brought forward. And a new bra fastened on the tightest hook will be loose within weeks.

What to do: fasten on the loosest hook, scoop and swoop, then check the band, cups, centre and wires in that order. The fitting checklist has the sequence.

Other things worth checking

• Your size has changed. Weight, hormones, pregnancy and age all move it. A size that was right five years ago may not be now.
• Your bras are worn out. Elastic lasts months, not years, with regular wear.
• Your breasts are different sizes. Fit the larger side. See bra fit for uneven breasts.
• You have sensory or skin sensitivities. Seams, lace, wires and labels bother some people regardless of fit. Seam-free, non-wired and soft-fabric bras exist in a wide range of sizes.

A plan that works for most people

1. Measure, and get a starting size with nothing added.
2. Find a retailer that stocks that size and the ones around it.
3. Try an unlined seamed bra and a moulded one, to learn which shape suits you.
4. Use the fit checks on each, changing one thing at a time.
5. If you are still stuck, book a fitting with a specialist who fits by eye. See the best places for a bra fitting in the UK.

Frequently asked questions

Why can I never find a bra that fits?

Usually for one of five reasons: the size you start from came from a flawed method, your true size is not stocked where you shop, the styles you try do not suit your shape, you assume one size fits across all brands, or bras are being put on without settling the tissue into the cups.

Is it possible that no bra will fit me?

It is very unlikely. UK brands between them cover bands from 28 and under to well over 50, and cups from AA to K and beyond. People who believe nothing fits are almost always in a size or shape that the shops they have tried do not carry.

Should I just stop wearing wired bras?

If you are more comfortable without wires, that is a perfectly good choice and modern non-wired bras support well. It is worth knowing that wires hurting is usually a sign of the wrong size or shape and not a property of wires.