Fit Guide

Your bra should be like your closest girlfriend: always a reliable source of comfort and support, lifting you up and encouraging you to be your best self. We know that when your bra fits correctly, you can do anything you set your mind to. That’s why when we heard that a recent study showed 8 out of 10 women are wearing an incorrectly sized bra, we set out to be the go-to source for well-fitting bras for large-breasted women.

We know walking into a bra shop when you have larger breasts can be daunting. We’ll help you find your new favorite bra, with expert fit guidelines and customer support, right in the comfort of your home.

What You’ll Need:

  • Measuring tape
  • Non-padded bra (optional)
  • Glass of wine (ok, you don’t need this, but it always makes it more fun.)

Let’s Get Started!

Tip – It’s best to measure yourself when you’re wearing a bra. Make sure it has no padding and is not a minimizer.

Step 1 – Measure Your Band Size

Think of your band size like a little army of bra soldiers that give your girls the support you need. You should be able to feel the band throughout the day, but it shouldn’t be uncomfortable. You’ll want to use the “back to front” method - bringing the measuring tape straight across your back and right underneath your breasts.

Pro tip: Make sure the measuring tape lies flat on your back and in a horizontal line all the way around. It should be a snug fit.

Once it’s snug around your body, round the measurement to the nearest whole inch (up or down). If your final rounded measurement is an even number, add 2 inches. If the rounded measurement is an odd number, add 1 inch.

So, if your measurement is 29 3/8 inches, round to 29. If the measurement is 29½ inches or more round to 30 inches. Example: 33 inches + 1 inch = a 34 inch band size.

Step 2 – Measure Your Bust Size

The cup size will pull this whole process together, providing support and coverage for your girls in the front. Wrap the measuring tape somewhat loosely around the fullest part of your chest and round to the nearest whole number for your cup size.

Pro tip: Not sure where the fullest part of your breast is? Typically it’s along the nipple line.

Step 3– Calculating Cup Size

We know math isn’t fun, but this is easy, we swear. Now that you’ve determined your band and bust size, it’s time to calculate your bra size and get to shopping. Grab your pen and paper, or calculator and subtract your calculated band size from your calculated cup size.

Example: if you calculated a 38 inch band size and a 34 inch cup size, that’s a 4 inch difference left over.

Use the sizing chart below to determine your size using this calculation. Example: with a bust size of 34 and a 4 inch leftover difference, you’re a 34D in US, UK and EU.

We’re proud to carry top brands that are expertly designed and made in the USA, Europe and the UK. Each bra on our web store will note in the description of which sizing chart to use.

Size Conversions

Cr8zy Curves is proud to carry well-known brands from the US, Europe, and the UK. To determine the correct bra size when ordering, each Product Description will list if the designer is from Europe or the UK. Follow the Sizing Chart below to convert to the appropriate size to order.

Difference US Cup Sizes European Cup Sizes UK Cup Sizes
4" D D D
5" DD/E E DD
6" DDD/F F E
10" J GG
11" K H
12" L HH
13" M J
14" N JJ
15" K


The band should be horizontal around your body without digging in or riding up. If you can run two fingers under the bra and it pulls away from your body, it’s too loose. If you can’t get two fingers under the band and it’s uncomfortable, it’s too tight.

Using a sweeping motion, scoop your breast up from the bottom into the cup. Your breast should fill the cup comfortably without any bulging or wrinkling. If there’s bulging or wrinkling in the bra, your cup size is too small.

Underwires are not uncomfortable if they fit correctly. The wires should sit flat on your ribcage without digging in or poking you.

This usually means your band size is too big. Try going up a size or two, and use our fit guide to measure your size.

This may mean your cup size is too small, bringing your bra up for the underwire to sit on the breast tissue instead of your ribcage. Try going up a cup size.

This means your band size is too big. Use our sizing guide and re-measure your band. Note that this can change your cup size!

We want our girls to stay comfortably in their cups. If your breasts are popping out of the top of the cup, try going up a cup size for better coverage.

This is a common problem with an easy fix! Your band size is too loose. Go down a band size so your breasts will be supported by the band, and not the straps.