Penelope next time you go and look in a shoe department, check out the design of the fronts, especially noticable in summer sandals or dressy strappy shoes, the front shape will be either square (or chisel) or curved, this is because there are indeed two standard toe shapes, curved and square. if you buy curved fronted sandals when you have a squared toe shape they will be all wrong and if you try on a square sandal and have a lovely graduating curve to you toes then the aquare front of the sandal will show too much sole.