Comparing a 30D Elle Macpherson Intimates Coranto Underwired (E75-64) with a 28DD Discover Mademoiselle Serena

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Measurement	Cm.				Cm.	Measurement
Hooks	2		1		1	Hooks
30D Elle Macpherson Intimates Coranto Underwired (E75-64)				28DD Discover Mademoiselle Serena
Fits ribcage	63.5		0.0		63.5	Fits ribcage
Stretched Band	0.0		0.0		0.0	Stretched Band
Band Length	52.0		2.0		50.0	Band Length
Cup width	11.5		1.0		12.5	Cup width
Cup depth	19.0		1.5		17.5	Cup depth
Wire length	20.0		0.5		19.5	Wire length
Cup separation	2.4		0.4		2.0	Cup separation
Strap width	0.9		0.2		1.1	Strap width

Summary

The band is pretty much the same in both bras. The 28DD bra has deeper cups than the 30D bra, but they are about the same width.