Depending on the text size you can use any of the below

TINYBLOB, TINYTEXT - L + 1 bytes, where L < 28
BLOB, TEXT - L + 2 bytes, where L < 216
MEDIUMBLOB, MEDIUMTEXT - L + 3 bytes, where L < 224
LONGBLOB, LONGTEXT - L + 4 bytes, where L < 232

For more on Datatypes in MySQL, refer this
http://dev.mysql.com/doc/refman/5.0/...uirements.html