Size guide: bras Here are tips on how to find the right size when you buy bras for pregnancy and nursing. Find your size A: Measure around the fullest part of your bust. B: Measure around your body under your breasts (if you don't get an even number, round up). Calculate your cup size by taking the bust measurement minus your under-bust measurement. For example, if you measure 90 cm around the bust, and 73 under your bust: 90 - 73 = 17 = cup size C. In this case your bra size would be 90C. Cup size The difference between the measurement across the fullest part of your bust (A) and the under-bust measurement (B) gives your cup size: A - cup: 12-14 cm difference B - cup: 14-16 cm difference C - cup: 16-18 cm difference D - cup: 18-20 cm difference E - cup: 20-22 cm difference F - cup: 22-24 cm difference G - cup: 24-26 cm difference GENEREL BRA SIZE GUIDE CHART Band size EUR 65 70 75 80 85 90 95 100 105 US/UK 30 32 34 36 38 40 42 44 46 FR/ES/BE 80 85 90 95 100 105 110 115 120 Cup size AA S S S A S S S M M L L B S S M M L L L XL C S S M M L L L XL XL D M M M L L XL XL XL E/DD M M L L XL XL XL F/DDD M L L XL XL XL G/DDDD L L XL XL XL