How can I make custom armor with its own hitbox

Recently I've made a model of ice skates which is just vanilla leather boots with blades at the bottom. The player is supposed to appear taller while wearing these(just like irl)

However, the blades keep falling through the ground so it looks like the player is wearing normal leather boots

So I wanted to know if there's a way to make the blades be a part of player's hitbox(or give them their own hitbox) so they won't be inside the block you're standing on(I have already tried moving the blockbench model higher but it didn't work)

If someone knows how to do this please reply