Product Type: Boot Stretcher. Per Stretcher Size: L: 55×19.5x7cm/21.7×7.7×2.8in; M: 55×17.5x7cm/21.7×6.9×2.8in; S: 55×16.5x7cm/21.7×6.5×2.8in;. Wide Application: Can be used for all kinds of boots, causal shoes, fashion sneakers, flats, peep toes, pointed toe, wedges, leather shoes, and etc.