Shaquille ONeals shoe size is 22. However, in a Q&A interview, he revealed that his foot dimension is 20, but he wears size 22 because his parents would buy him large shoes to last him longer, and he still holds on to this principle despite being rich. Having such large feet means ONeal cant just walk into a department store and leave with a few pairs of shoes. Instead, he had to custom order kicks just to find some basketball shoes in his size. ONeal ultimately signed a deal with Reebok, which produced signature shoes for him.