The interface of a Sign with the text "This is a sign".
The Sign is a decorativefurniture item that can store a player-written message. A Sign must be placed and then the ⚷ Open / Activate button must be pressed on it to edit or display its message. A Sign can be placed on top of blocks, beside them, or hanging from their underside. On the Desktop version, Console version, Mobile version, Nintendo Switch version, and tModLoader version, they can also be placed on walls. A Sign's message can be up to 10 lines long, at 48 characters max per line, for a total of 480 characters maximum per sign. Signs can be used for decoration, labeling areas, adventure text, etc.
On the Nintendo 3DS version, Signs are limited to 16 characters, with a maximum of 5 numbers, and no punctuation or special symbols can be used.