The shoe size for a one-year-old varies, but according to the shoe size charts from different brands, the average shoe size for a one-year-old is around 5.5 to 6.5. However, it is important to measure the babys feet before buying shoes, as every childs feet grow at different speeds. Here are some steps to follow when measuring a babys feet:

1. Measure the babys feet with a ruler or printable size chart.
2. Stand the baby barefoot on a piece of paper and use a pencil to gently trace around each foot.
3. Measure the length of each foot tracing from the heel to the tip of the longest toe.
4. Add ½ inch, or 1.3 cm, to the longest measurement to allow a little room for growth.

It is also recommended to leave a little extra room for the childs feet to grow into their new shoes. Once you have the shoes, confirm they fit with the "toe test". A pair of shoes with the right fit will make a huge difference for the babys comfort and healthy foot development.