What's a sister size to 30D/DD? most shops don't carry band size

REAL Celebrity Bra Sizes – Brastop UK

Sister Sizes: The Bra Secret Every Person Should Know – Sister Sizes & Equivalent Bra Size Chart – ThirdLove

The Big Bra Deal Impish Lee - Blog

Cosabella Never Say Never Curvy Sweetie Bralette

The Ultimate Guide To Buying, Wearing, And Caring For Bras

Why do brands think if you have a small band size you can't have big boobs? They literally make H cups for bigger bands. : r/bigboobproblems

Sister Sizes, Bra Fit Guide & Size Charts

What is my bra size?

Butterfly Collection Blog - Life in Big Boobs: Bra School: Not all D cups are the same size