Because 38 d means you're bigger around and your boobs are less

Because 38 d means you're bigger around and your boobs are less large in comparison

Is a size 38B bra too big? - Quora

How to Measure Your Bra Size: Bra Band and Cup Measurement Chart

What Does My Bra Size Actually Mean?

I bought 38d bra the band size is correct but the cup is big? - Quora

How Much Do Your Breasts Weigh?, bra fit, cup sizes and more

Bra Size Calculator & Sports Bra Sizing

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Average Breast Size & Bra Size in the USA & World

What is considered a big bra size and what is considered small