What’s my bra sister size?
Who she is and why you should meet her
Sister what now? Sister sizing is a lingerie sizing term that’s kind of like fitting into your sister’s clothes. While she may not be your traditional size, sometimes certain picks from her wardrobe can fit you like a glove. To put it in plain English, here’s the literal translation.
Sister sizing = Your bra size equivalent
- If you do DOWN an underband size – you go UP one cup size.
- If you go UP an underband size – you go DOWN one cup size.
Why sister size?
Ideally, your perfect fit will line up with your underband and overbust measurements. These can be found with our Bra Size Calculator. That said, it can be helpful to try alternate sizing that still accommodates your measurements, while tailoring to your unique body shape and personal preference.
Relaxed support
Certain bra shapes may feel better on your body type with the underband allowing more give. Your preference may be a relaxed underband fit, without compromising on support. Even with a more relaxed fit, your underband shouldn’t be loose.
Comfortably snug
Certain bra shapes may feel better on your body type with your underband sitting snug. When opting for the body-hugging band option, remember your underband should feel firm but not restrictive.
The up-down cup rule
Both versions of sister sizing should always fit your cups properly. If you follow the guide above, these will stay true to your measurements.
Underband goes UP – cups go DOWN.
Underband goes DOWN – cups go UP.
Find your sister size
We all love options, especially when it comes to our beloved bras! We believe one can never spend enough attention to detail when searching for the perfect fit. Here’s a step-by-step guide to help you experiment with the fit and feel of your sister size.
Step 1. Enter your measurements into our Bra Size Calculator to discover your ideal bra size.
Step 2. Find your bra size in the chart below. The sizes directly to the left and right of your bra size are your sister sizes.
Step 3. Find a Leays near you to experiment with your sister sizes, with the help of one of our expert Bra Stylists.
1-2-3 sister-size me
Here’s a quick recap to help you confidently experiment with your perfect fit(s).
1. A sister size provides your equivalent cup dimensions, with variations in your underband
2. Try going UP in underband sizing if your current bra band feels uncomfortably tight or digs in. Try going DOWN in underband size if your current bra band is loose, riding up or lacks support.
3. While a sister size won’t always provide your perfect fit – they’re great variations to try instore to discover what looks and feels best on your unique shape.