Image Sizing and Optimization
Thumbnails - 1 on home page/press
3:2 horizontal ratio
Size 300px x 200px
Banner Images - 1 per event page
Horizontal 1500px wide
Half is what can be seen on the desktop (keep the focal point to no more than half the image). On mobile one can see the entire image.
Regular Images - 3-4 per event page
Resize images and then compress using ImageOptim.