To use these sandals, simply slip your feet in. They're great for special occasions like parties or evenings out. When it comes to sizing, they fit true to size, so you don't have to worry about getting the wrong size. For maintenance, keep them away from water as the rhinestones and vinyl might get damaged. You can use a soft dry cloth to clean any dust or dirt. Also, store them in a cool, dry place to maintain their shape and shine.