New Shoes, resizing your pattern.
You may want to try to enlarge or reduce your shoe pattern for any number or reasons. Up until around a child size 4 or 5, you should be able to enlarge your shoe and down to a child size 0. Anything larger or smaller will make the show appear distorted and will require more advanced methods for resizing.
To enlarge or reduce your shoe pattern, you will need a printer or copier that allows you to enlarge printing by percentage. Start with a trace of babies foot if you can get one or a measurement by length in cm. CM allows you to work in smaller increments. If you want room to grow, add 1 - 1.5 cm to the length needed to fit your babies foot.
Using the copier or printer, enlarge your pattern pieces using the same percentage for each piece. Usually a 100% increase will double the size. So start with a smaller percentage and start with the sole. Once your sole piece is the length you need it to be, print the remaining pieces in the same percentage output.
Be sure that you leave room for seam allowance on all the patterns you increase.
To increase beyond a child's 4 or 5 means that the pattern will need to be lengthened. Children's feet start getting longer faster than wider at some point. At this point it you will need to increase the pieces using a tracing method and elongate the soles first. This is the hardest method and requires trial and error to get the patterns just right. It's time consuming and tedious but the result is a usable pattern that fits.
Best of luck with resizing your new shoes.