You can stretch the toe of a shoe by spraying a stretching solution on the top side of the toe of the shoe. Keep in mind that there are also some stretching solutions available in the market which recommend spraying from inside of the shoe.
Take a shoe stretcher and put it inside the shoe, when it reaches the toe portion twist it to open until it gets taut enough to apply force. Then, leave the shoe in this condition for the night and next day repeat the same procedure with the other shoe. It is suggested that you should keep the shoe stretcher inside the toe portion until you want to put the shoe on.
To maintain the added size of the shoe it is necessary that the wearer should wear them with thick socks for several hours.
After wearing the shoes with heavy socks you should wait for one day before trying them with regular socks. In this way you will get to know whether the shoe requires some more stretch or not. If yes then use the shoe stretcher again in order to repeat the aforementioned process.