Since water expands when it's frozen, you can use ice to stretch your shoes. All you have to do is fill two freezer bags with water, making sure to remove all the air from them before sealing. Place the bags in your shoes, then put them in the freezer. Leave them in there for 4 to 8 hours. Once the water has properly frozen, take your shoes out of the freezer and let them sit at room temperature until the ice thaws to a point where you can slip the bags out of your shoes. Voila! Your shoes should be nice and stretched for more comfy wearing.
Keep silica gel packets in your shoes when they’re not being worn. Have you noticed after purchasing a pair of new shoes those little white packets containing tiny clear balls inside your shoe box? Those packets contain silica gel which absorb moisture and keep your shoes from shrinking. Hold on to those packets instead of throwing them away and stick them in your shoes when you’re not wearing them. You can ask a shoe store associate for extras, if necessary.