Today something happened and the game's fonts became as seen in the screenshot below. I can not even read anything. What caused this and how can I make it normal size again? (Font size does not change when I change resolution.)
Delete your csgo folder: Steam > Steamapps > Common > Counter-Strike Global Offensive > CSGO (If you want to save anything in the folder, Demos, Maps, Screenshots, do so before deleting it.
Then go to steam, rightlick on the game, properties, local files, verify integrity of game.
This will require the csgo folder, changing everything to default, and it should fix your problem.