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Do You Know Your Sister Size?

The Bra Lab Uses Sister Sizing

Trust Us, It Works! 

Get Your Fine Tuned Fit For Maximum Support & Comfort

CONVERT SIZE 

Combine cup & back strap sizes to get your perfect fit.

SISTER SIZING 

As the back size increases the cup size decreases but the breast volume stays the same.  

Email us with your measurements to help find your perfect fit at shop@thebralab.com
 
The bust size is the loose circumference measured around the chest over the fullest part of the breasts
The band or frame size is the firm circumference, fitted not tightly, measured directly underneath the breasts
 
 

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Our Technology Boosts Your Bra's Versatility & Comfort

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WAYS TO WEAR YOUR BRA LAB