The Logos website allows products to be sorted by Bestselling, Newest, Oldest, Savings, Lowest Price, Highest Price, and Title. Beside the "Sort by" options is "Show:" which by default shows 15 search results although this can be manually adjusted to show 30, 45 or 60 results.
I understand that there was a time when internet access was so slow that limiting search results by default to 15 items made a lot of sense, but I wonder if now might be an appropriate time to change.
Making 60 products the new default would, to me, not seem unreasonable, or even changing how search results appear by making more results automatically populate the bottom of the list as the user scrolls down; Google images has this kind of functionality.