Understanding the 30D Bra Size
A 30D bra size pairs a supportive 30 inch band with a D cup that provides pronounced projection and structured shaping. It suits wearers who need depth through the lower cup while maintaining close wire contact along the breast root for stability.
To confirm whether 30D matches your measurements, visit the bra size calculator and read our fitting guide. Sister size comparisons with 28DD or 32C are in the Bra Sizes Explained guide.