User blog comment:DoomFest/~The Great Thumbnail Contest - Season 2 ~/@comment-4363364-20160415131712/@comment-26561766-20160416114113

Oh yeah so with a fanart you didn't have the choice for the size of the picture.

Yeah in general it's better if they're in the same size. Even in Death Battle thumbnail we could see that, the majority of the thumbnails as this caracteristic of having the two characters at the same size (for instance : Yang VS Tifa, where it works perfectly). The Guts VS Nightmare thumbnail which has a focus on Guts' head but in where we see the entire body of Nightmare body seems a bit strange to me, I think here that's the similar style of drawing fills a little bit this default.