Bra Size Calculator
Finding your perfect bra size is the first step to feeling truly comfortable and supported. At Designed by Debz, our bras and bralettes are handmade in the UK to our own unique patterns — they don't follow standard high street sizing, so we always recommend measuring before you order.
How to Measure Your Bra Size
You'll need a soft measuring tape. Measure in inches or centimetres — whichever you prefer.
Step 1 — Underbust (Band Size)
Wrap the tape firmly around your ribcage, directly under your bust. Keep it level and snug. This gives you your band size.
Step 2 — Bust (Cup Size)
Measure loosely around the fullest part of your bust, keeping the tape parallel to the floor. This gives you your bust measurement.
Step 3 — Calculate Your Cup Size
Subtract your underbust measurement from your bust measurement. The difference determines your cup size:
- Less than 1" / 2cm — AA
- 1" / 2–3cm — A
- 2" / 4–5cm — B
- 3" / 6–7cm — C
- 4" / 8–9cm — D
- 5" / 10–11cm — DD / E
- 6" / 12–13cm — F
Our Sizing vs High Street Sizing
Because our bras are made to Designed by Debz's own unique patterns, they may fit differently to what you're used to from the high street. We strongly recommend using your measurements rather than your usual label size when ordering. If you're between sizes, our size guide notes will help you decide which way to go.
Use the Calculator Above
Enter your measurements into the calculator to find your recommended Designed by Debz size. Still unsure? Get in touch and we'll help you find your perfect fit.
Frequently Asked Questions
What if I'm between sizes?
If you're between band sizes, we generally recommend sizing up for a more comfortable fit. For cup sizes, consider your preference — a snugger fit or a little more room. You're always welcome to contact us for personalised advice.
Do you offer a wide size range?
Yes — we're committed to inclusive sizing. Our bras and bralettes are available across a range of sizes, and we're continually expanding our offering. Check individual product pages for available sizes.
Can I return or exchange if the size isn't right?
Please review our returns policy before ordering. As our pieces are handmade to order, we recommend double-checking your measurements carefully.
Shop Our Bras & Bralettes
Once you know your size, explore our full collection of handmade bras and bralettes — bold prints, inclusive sizing, and made with care in the UK.
Shop Bras | Shop Bralettes
