[futureal]

I don't think you'd want to use a blob in these cases; blob stores the data in binary, so is suitable for filedata such as the actually image data, for example.

I would use something like:

[sql]
ALTER TABLE `forum` ADD `forumattachsize` int(11) NOT NULL
ALTER TABLE `forum` ADD `forummaxwidth` int(11) NOT NULL
ALTER TABLE `forum` ADD `forummaxheight` int(11) NOT NULL
[/sql]

Although you could change the size of the fields as necessary.