Super easy to use: Insert the shoe expander into your shoes with a heel block close to the heel and turn the knob clockwise quickly to stretch them to the desired length; turn the lovely heart-shaped crank handle clockwise to expand them to the desired width; please make sure to leave the shoe stretchers in the shoes for at least 24-48 hours; the longer you leave them in, the better the overall result; they Fit sizes from women US 5.5-US 10 Adjustable shoe expander: The shoe widener offers more than 2 adjustable ways to meet your various needs; there are 2 common use methods: Stretch length to increase shoes size; Stretch width to widen shoes; the plastic shoe expander comes with bonus- 8 bunion plugs and 2 height pads which could go in each shoe stretcher for height and partial adjust thus enable you use them for better target to prevent painful blister