Busty Brits can now buy the biggest bra ever seen on the high street - a colossal K-CUP dubbed "the windsock". Until now the largest bra on general sale was a giant G-cup. But Selfridges is introducing the enormous K-cup after a surge in demand from giant-boobed women. The £32 bra has a whooping 4ft circumference and extra-thick straps to support its contents. Each cup measures an impressive 18 inches at its widest point.