TINYTEXT [CHARACTER SET charset_name] [COLLATE collation_name]

A TEXT column with a maximum length of 255 (28 - 1) characters. The
effective maximum length is less if the value contains multi-byte
characters. Each TINYTEXT value is stored using a 1-byte length prefix
that indicates the number of bytes in the value.

URL: https://mariadb.com/kb/en/tinytext/

