Hi Bjarne

look into

Admin > Configuration > Maximum Values

and

Admin > Configuration > Index Listing

You can customize the number of products in any way you like. For example, your 49 products laid out in a 3 horizontal config would give you 17 horizontal rows of products. That's ok if you only have a few products, but once it gets into the 100's the page would be a mile long and take ages to load. Could be a deterrent to customers.

Frank