Buying lingerie online becomes much easier when you stop treating the size on the label as the whole answer. Start with your current measurements, check the individual brand’s size guide, read the product details closely and confirm the returns policy before ordering. When the parcel arrives, assess comfort and support before you assess the mirror.
Before you buy: take stock of what already works
Begin with the bra you reach for most often. Note its size, style and brand, but also note why it works. Is the band steady? Do the cups contain your breast tissue without cutting in? Does the centre sit comfortably? These observations are more useful than the label alone because two bras marked with the same size can fit differently.
If your current bras feel less reliable than they used to, take fresh measurements using our at-home bra measuring guide. Measurements give you a sensible starting size. The final decision should always come from the fit on your body.
How to read a lingerie product page
A good product description should tell you more than the colour. Look for the cup construction, level of coverage, wiring, padding, strap position, fastening and fabric composition. Together, these details tell you how the piece is likely to behave.
- Shape: a plunge has a lower centre and works well beneath a V neckline. A balconette usually has wider-set straps and a more open upper cup. A full cup offers more coverage.
- Structure: moulded cups create a smooth outline, while seamed cups can give more shaping and depth. Neither is automatically more supportive.
- Fabric: stretch lace adapts more readily to small differences between breasts. Firmer fabrics can feel more contained but may be less forgiving between sizes.
- Reviews: prioritise comments that describe the wearer’s usual size, breast shape and the precise fit issue. A simple star rating tells you very little.
Always open the size guide for the brand you are buying. If the retailer provides UK, EU and US conversions, use its own chart rather than a generic chart. Conversions are helpful, but they are not perfectly standardised across every range.
Choose for your body and your wardrobe
There is no single best bra shape. Think about the clothes you want to wear, the amount of coverage you enjoy and any recurring fit problems. If tall centre wires feel uncomfortable, read our guide to plunge bras. If straps often show beneath wide necklines, a balconette or balcony bra may make more sense.
For a new brand, ordering one style in two nearby sizes can be useful if the retailer allows it. Keep all tags and protective seals in place, try the garment on over clean underwear where appropriate, and avoid wearing it for longer than a normal fitting.
The five-minute fit check
- Fasten a new bra on its loosest comfortable hook so there is room to tighten it as the band relaxes with wear.
- Settle all breast tissue into the cups, including tissue from the sides.
- Check that the band runs level around your body and stays in place when you lift your arms.
- Look for smooth cups with no spilling, pinching or empty folds.
- Move, sit and breathe. Support should not depend on standing perfectly still.
Our full bra fit checklist explains what each part of the bra should do. If one size does not work, try a nearby size or a different shape. A fit problem is not a body problem.
Check returns before removing anything
Returns rules can differ by product and retailer, especially for knickers, bodies and other items sold with a hygiene seal. UK distance-selling rules usually provide a cancellation period for online orders, but sealed goods may be exempt once a hygiene seal has been broken. Read the seller’s current terms before buying and follow its instructions when trying items on.
Keep a simple note on your phone with the brands, sizes and shapes that fit you well. It turns future shopping into comparison rather than guesswork.
Frequently asked questions
Should I always order my usual bra size?
Use it as a starting point, then check the brand’s chart and fit notes. Different constructions and fabrics can change how a bra feels even within the same brand.
Can I trust an international size conversion?
Use the retailer’s own conversion chart. Letter progressions and band conversions are not identical in every sizing system.
What if I am between sizes?
Try neighbouring sizes and compare the whole fit. You may also need a sister size, which changes the band and cup letter while keeping a similar cup volume.
Sources and further reading: GOV.UK guidance on returns and refunds, ASOS guidance on reading size and fit information, and Bravissimo’s fitting guide.