The Diamond foam-lined bustier pattern from Pin Up Girls will become a staple in your ?fancy dress? wardrobe. This pattern with two views features an off-set vertical seamed cup for the roundest styling, and a shortened upper cup for maximum lift. The Diamond Bustier has been specially designed to use with foam lining, therefore enabling you to use virtually any stretch fabric over it as a cup cover. The sizing for the Diamond Bustier is a bit different from other bra patterns, in that we use the Bottom Cup Depth (BCD) to determine the size of the cup. This is the measurement from the wire line at the base of the cup up to the location of the apex. It is much more accurate than relying on Ready-to-wear bra sizing, which can differ from company to company. Determine your BCD by measuring your best fitting bra between these two points. All cup sizes from 3.0 to 6.0 are included in the pattern. Combine these 13 cup depths with 1 of 8 band sizes from 26? (65 cm) through 40? (100 cm) to make the Diamond Foam Lined Bustier size range equivalent to over 100 unique bra sizes.