SELECT CHARACTER_MAXIMUM_LENGTH
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'your_table_name'
AND table_schema = 'your_db_name'
AND column_name = 'your_column_name'
LIMIT 0 , 1
SELECT CHARACTER_MAXIMUM_LENGTH
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'your_table_name'
AND table_schema = 'your_db_name'
AND column_name = 'your_column_name'
LIMIT 0 , 1