Dean would 100% make Sam a knife like this!
Oh, and Dean is such a mother hen. He would jump right into that, just like when he started cooking real meals in the bunker and Sam was so impressed. He would have an entire line of food made for Sam’s size, and Sam would just try to point out that he made way, way too much for a guy four inches tall.
End with Dean snacking on his teeny bite sized pancakes since he made Sam such a huge stack.