Lucy May's guide to your perfect fit


For a high proportion of women wearing the right size bra is still a big issue. Finding a pretty, yet comfortable bra that fits can be a minefield, not helped when fit can vary from brand to brand! We hope you’ll love the quality and fit of Lucy May as much as we do and find our fit guide useful and easy to use!

Traditionally, finding the perfect fit involves taking two measurements of the body: the underbust measurement and the overbust measurement. We advise you to take the underbust measurement, which is great for determining your band size and then follow our 1-4 fit guide steps to establish your cup size, based on the bra size you’re wearing. Measuring your overbust can give you an indication of cup size, but as our bodies are changing shape, this can be misleading depending on the proportions of your back to bust. In some cases, it can be a size out from your true cup size!

To take your underband measurement, place a tape measure firmly, but comfortably around the body, just under your bust. If you place it straight around your body, on the lower edge of where your bra wing would sit, that’s perfect! It can be confusing, as the body measurement isn’t the same number as your bra band size. Have a look at our guide below which will help you work it out. For example, if you measure 29 inches around the body, then your bra band size is a 34.

Once you’ve got your band size, have a look at our fit guide and pictures and note whether any of these issues apply to the bra size you’re wearing and adjust if need be as suggested.

  1. WIRES   - The wire should sit flat against your body and encompass the whole of the bust. If the wires are standing away at the front or pressing on your breast tissue at the side, try going up a cup size. Ultimately, your wires should feel comfortable, so if they’re not, you’re in the wrong size!
  2. CUPS – Your cup should fully encase the bust and support you. Some styles are intended to have a lower, sexier coverage, but the cup should still fit and not cause any double busting where the neckline is pressing into you. Our padded, moulded cup will give you a great cleavage,(see picture) but if the neckline is pressing in and causing you to have a ‘four boob’ effect, then try a size up! 

    If you have any excess fabric in your non padded cups or any ‘fresh air’ on your padded cup where the neck edge is standing away, then try a size down.

  3. UNDERBAND  - basically your wing! This should sit in a nice straight line at the back (see picture). It should feel firm, but comfortable. It’s always good to fit on the middle hook, so you can tighten through wear if required.

    If your wing rides up at the back, then it’s too loose, so try a back size down. If your cup is ok and you need to go down a back size, don’t forgot to go up a cup size. For example, if your 34B is too loose around, but your cup size is perfect, then you need a 32C.

  4. STRAPS – Make sure your straps are comfortable and not digging in. If you’re feeling like you have to pull your straps tight to get support, then your underband and cup could be too big and not offering the support they should be to your bust. If your straps keep falling off your shoulders, check whether they have come loose in wear and need tightening up. Sometimes it can be the style of the bra that sits wider and doesn’t always suit a narrow frame, but you would notice this when you first put the bra on.


If you think you need to go up or down a back size, but your cup is ok, take a look at the cup guide to see how the cups cross grade. For example, a 34C is the same cup capacity as a 38A, 36B and 32D. If your underband is ok, for example a 34B, but your cup is too big or too small, you can try a 34A or 34C.