How to make hands look bigger, less dainty?

While you cant chang. The bone mass of your hands, the girth of the bones or the length of your fingers, you can add grip strength, and this may make the hand feel and look a bit thicker. Compare most dominant to non dominant hands and you will see a subtle difference if you look carefully. Thats about the best yo can do unless you just add callous tough skin and some grime from hard manual work.