Why do bra sizes go from D, DD, to DDD instead of just going from

What are the biggest difficulties faced by women when it comes to plus size bra fitting? - Quora

Bra Fitting: Guide to Fitting the Right Bra for You

Bra Size Measurement & Cup Size A, B, C, D, DD Bra Sizes AND Extra Large Breasts

What's the difference between a DDD, E, and F bra cup size? - Quora

The Difference Between D And DD Bras Explained

Understanding Bra Sizes - Curvy

What bra sizes are considered plus size? - Quora

DD Cup Bra Sizes DD-mystified – Harlow & Fox

List of Bra Sizes

36DD Bras: Equivalents Bra Cup Sizes, Boobs and Breast Size