We have always bought Saucony athletic shoes for our son since he was a toddler. He had issues with tripping and falling as a little guy and Saucony shoes were the most flexible and comfortable shoes for him. They have always run about a size smaller then other athletic shoes, and since we know this- we always buy them one size larger. My son is 5 1/2 and wears an 11W in his usual Sauconys. He needed the next size up, but these specific yellow/gray Cohesion shoes fit shorter and not as wide (though I ordered a Wide). I would go up a full size and a half when ordering these. They are also very sturdy, and not as flexible as all the other Sauconys he's ever wore. It doesn't seem to bother him now that he's older, but if you are buying these for a clumsy toddler- you may want to be aware of their thicker sole and less flexibility.