CRYSTAL WAVE is featured here in blue satin with a 3.5 inch flared heel. Gorgeous original crystal wave design on the back of this beautiful shoe with thick straps in front. 100% Swarovski Crystal AB. Straps cross under arch for maximum support. Ordering tips: This shoe runs true to US street shoe size. Order true US street shoe size; if you want an even tighter fit order half size down but your toes may go over.