How to change products per row?

How can I change the no. of products per row at this link

http://www.kitzimollitzipettiskirts.co.uk/index.php?main_page=products_all

to show 3 products accross and not 4.

In admin I thought that I had already altered no. of products per row to 3 but it is still showing 4.

thanks

admin > config > product listing > Product Listing - Columns Per Row > set to 3

This is already set to 3 but the display has not changed for some reason...any ideas why

:oops:
I missed that that was your "all products" page

As the default list is in rows and not columns you have added some modification to achieve the column listing and as this is not in the default code you will need to determine if the modification includes any admin setting or if it is hard coded