Widget                 small preview pics eg sidebar news                36x36

Square                 small image for blogs                             180x180

Featured               images for fullsize pages and fullsize slider     1500x430
Featured large         images for fullsize pages and fullsize slider     1500x630 

Extra large            images for fullscreen slider                      1500x1500

Portfolio              images for portfolio entries (2,3 column)         495x400

Portfolio small        images for portfolio 4 columns                    260x185

Gallery                images for portfolio entries (2,3 column)         845x684

Magazine               images for magazines                              710x375  

Masonry                images for fullscreen masonry                     705x705

Entry with sidebar     big images for blog and page entries              845x321

Entry without sidebar  images for fullsize pages and fullsize slider     1210x423