How to do render 32x32 items twice as big

I don't know how to do 2x rendering for my items. I tried ripping a .json of a 2x hand model from itembound because that uses a lot of 32x32 textures, but it didn't work. How do I make my 32x32 item render twice the size of a 16x16 item? (I'm also using a more recent version of Mcreator)