I like the idea of changing "Downloads" to one of your suggestions above. Often, I look at pictures at several of the offered sizes to get a good look at the whole picture and to look at areas within. If I look at a picture in three different sizes, would the creator of the picture get credit for three "Downloads?"
My thanks to all who leave comments for my work and to those of you who like one enough to make it a favourite. To touch just one person that way makes each image worthwhile. . . . . . . . . .. . . . "The question is not what you look at, but what you see" ~ Marcel Proust . . . . The aim of argument, or of discussion, should not be victory, but progress." ~ Joseph Joubert (1754-1824)
I think that changing it to:
"Visits"
"Views" or "Full Size Views"
would make it clearer.