For larger images, you can choose the Individual Prints layout and specify a bigger picture size.
A Contact Sheet is the most common layout for multiple pictures on a page, but these thumbnails are too small for sorting a project. If you are working on a project that involves many images, such as a calendar, a slide show, a book or an exhibit, It can be very useful to print small versions of your candidate images so you can physically sort and rearrange them for the best effect.