Under Armour Boys' Leadoff Low Junior Rubber Molded Baseball Cleat

My grandson is a size 9.5 in regular shoes. What size should he wear in these cleats??

What size should i get 3 year old size 8 in shose a. It confused?

I need size 2.5 could go 3 do you have it ?

My son is 4 with wide feet. He wears a 10c now but they are kind a tight on him. Would the size 1 little kid fit him? Thanks