If you go to the Canon web site and look at that lens, then click accesories, the lens hood they recomend is the EW78D.

Amazon link :  http://www.amazon.com/Canon-EW78D-Lens-28-200mm-3-5-5-6/dp/B0000AE66S

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html