Actually there is a Russian short story by writer Bayan Shiryanov (Баян Ширянов) titled "Пробел" (space character), which has length of exactly one character.

Actually there is a Russian short story by writer Bayan Shiryanov (Баян Ширянов) titled "Пробел" (space character), which has length of exactly one character. Here is its illegal copy (between quotes): " "