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

What's a sister size to 30D/DD? most shops don't carry band size 30, so I'm wondering what an alternative size to mine would be, so I can buy bras locally : r/ABraThatFits

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

What is a DD exactly?

How UK and US bra sizes compare… – Curvy Kate US

How to Find Your Bra Size: The Easy Guide - Our Fashion Garden

80% of Women Are Wearing the Wrong Bra—Here's How to Find Your Correct Size

Why do shops stop at a D or Double D bra? My Boobs are bigger than that! - Mysmartypants

What Are Bra Sister Sizes? – Harlow & Fox

Bra Sister Sizes + Sister Size Chart

Aerie - We are very excited to unveil our new bra guide on Aerie.com! Read more about our new guide on our blog: #AerieREAL