Increase sidebar width on category pages

On the homepage the sidebar allows for a 300 width ad but on the category pages the sidebar decreases in size and probably shrinks to 200 or less in width. I see on template>layout you can increase sidebar percentage but it still does nothing for category pages. How do I increase category sidebar width without changing the homepage sidebar width? Thanks!

Hi

If you are referring to Joomla Categories, you can use either menu item ID or component name.

For example if you want increase on specific category that have ID 421 :

screen2.jpg

Or if you want to use component name for all Joomla! content display:

screen.jpg