INFORMATIONAL GUIDES
Bra sizing explanations
Read a focused explanation first, then use its supporting example or interactive check.
How to Measure for a G Cup Bra
Compare the two raw underbust readings and calculate a starting size for each; do not average away an unexplained difference.
Read this guide →What Does a G Cup Look Like on Different Band Sizes?
With the system and cup letter held constant, each two-inch band step adds one nominal capacity step. This is not a physical volume measurement.
Read this guide →Calculator Says G Cup: How to Check Your Result
Estimate a size, then compare the current UK label’s nominal capacity and band with the new estimate.
Read this guide →G Cup Breast Weight and Volume: What Size Can Tell You
The result explains the supplied information and its limits.
Read this guide →For a starting size and the meaning of G in UK and US systems, use the main G cup bra calculator and explanation.