How to Measure Your Bra Size at Home: Step-by-Step Guide
Did you know that most women are wearing the wrong bra size? An ill-fitting bra can cause back pain, slipping straps, spillage and that all-too-familiar dig of the underband. The good news: you can measure your bra size at home in just a few minutes with nothing more than a soft measuring tape and a mirror. In this guide, we’ll walk you through exactly how to do it — step by step — so you can shop with confidence.
What You’ll Need Before You Start
- A soft, flexible measuring tape (the kind used for sewing).
- A non-padded or lightly lined bra that fits you reasonably well.
- A mirror, so you can keep the tape straight and level.
Tip: measure yourself in your underwear or a thin bra — never over thick clothing — for the most accurate numbers.
Step 1: Measure Your Band Size
Wrap the measuring tape snugly around your ribcage, directly under your bust, where the band of your bra sits. Keep the tape level and parallel to the floor, and breathe out normally. Note the measurement in inches. If the number is even, that’s usually your band size; if it’s odd, round to the nearest even number. A supportive band does about 80% of the work in a well-fitting bra.
Step 2: Measure Your Cup Size
Now wrap the tape loosely around the fullest part of your bust (usually across the nipple line), keeping it level. Don’t pull it tight — it should rest gently. Note this measurement in inches.
Step 3: Calculate Your Cup and Bra Size
Subtract your band measurement from your bust measurement. The difference tells you your cup size:
- 1 inch = A cup
- 2 inches = B cup
- 3 inches = C cup
- 4 inches = D cup
- 5 inches = DD / E cup
Example: if your band is 34 inches and your bust is 37 inches, the 3-inch difference means you’re roughly a 34C.
Signs Your Bra Doesn’t Fit
The band rides up your back
Your band should sit level all the way around. If it climbs up, go down a band size or tighten the hooks.
Straps dig in or slip off
Straps should support without cutting in. Constant slipping often means the band — not the straps — is too loose.
Spillage or gaping cups
Bulging over the top means the cup is too small; wrinkling or gaps mean it’s too big.
Fitting Tips from Elishwear
Sizes vary slightly between styles, so always check the size guide for each bra. If you’re between sizes or want everyday ease, a seamless comfort bra or a full-coverage lift bra gives a forgiving, supportive fit. Prefer a little shape and a smooth finish under clothes? Try a lightly padded cotton net bra. Explore every style in our bra collection. Re-measure every 6–12 months, as your size can change over time.
Frequently Asked Questions
How do I measure my bra size at home without a measuring tape?
Use a piece of string or a phone charging cable to wrap under your bust and across your fullest point, mark the length, then measure it against a ruler in inches.
Should I measure my bra size with a bra on or off?
Measure your band against your skin or a thin, non-padded bra, and measure your bust over a lightly lined bra for the most realistic cup result.
Why does my bra size feel different between brands?
Cup and band shapes vary by design and fabric stretch, so always check each product’s size guide and use your usual fit as a starting point.
How often should I re-measure my bra size?
Every 6 to 12 months, or after any noticeable change in weight, as your size can shift over time.
