As Rosie says, they are clearly labeled for size when you pull up the photos in the store here.
For instance, you get full 12 x 12 pages when they are labeled that way. In my examples (see below)... the Urban Traveler, and the I Heart Summer collection sheets are more like typical full sheet pages. The 24 Seven Collection examples are also full sheets however they certainly have locations that it could make sense to cut them into smaller pieces. You could use any of these sheets either way. They also have border strips and title strips available too. They are the same sort of thing.
In the collection displays, they simply split up some of the images to show you all the different pages at once. In those, there should be some of both types of pages and of course stickers etc. Even the stickers arrive on large sheets though.