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

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

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The Big Bra Deal Impish Lee - Blog

Sister Size Bra Know Your Sister Size With Chart

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Everything You Need to Know About Bra Sister Sizes - The Melon Bra

Freya Women's Deco Vibe Underwire Molded Plunge T-Shirt Bra, Opal, 30D at Women's Clothing store

Your Bra FAQs, Answered! - #AerieREAL Life