The WashU Web Theme has numerous recommended image sizes for different elements and sections of a site. Images that do not meet the minimum sizes will not display.

ElementRecommendedMinimum
Featured Image2880 x 11001440 x 550
Spotlight2880 x 14401440 x 720
Posts1140 x 760760 pixels wide
Items1140 x 760760 pixels wide
People560 x 772280 x 386
Places920 x 620460 x 310