Partial Key / Keyboard Cover

Especially while gaming it sometimes happens to me to stroke unintended keys. Not really a big issue though but what about the idea it cannot happen at all? Originally i mostly damned ESC and Function Keys so that i made a cover / cap for them but then i thought it will be pretty easy to make a cover for other parts of the keyboard - arrow keys, num block, delete block, scroll block.

If you print one / all of them you might find out they seem to be over sized but i wanted them to fit with diverse keyboards i am using and on the other hand they should not be to big to border with other keys. Tested and use them on 2 different mechanical Logitech keyboards, on a Technet mechanical keyboard as well as ona Corsair Keyboard.