I would need to limit the number of products displayed on a page for only a certain category in Magento.
For example, the category pencils show 10 products per page while category pens show 20 products per page.
In other words, how to rewrite the paging configuration of Magento for a category ?
You Can Visit App->design->fronted->default->theamName->page->template->html in HTML Folder or open List.phtml file on top of file you find category id and then apply number of product show on using IF else Condication .
Hope This Help You
Thainks