I never ever use anything with a screen without first applying a screen protector. However, I haven't seen any available for the DSi. I wanted to cut my own out of some iPhone ones that I have but I dont know the exact demonstrations. I also dont know if I'd have to cut them smaller then the actual dimensions for them to fit. I just looked now and they have them but they are bundled in with starter packs. I haven't checked online but I dont want to order them. I just need them now. Anyone know the exact measurements?