Guidelines for optimizing website images. 
Note: Save images in JPG format.

Small

Approximate size in pixels = 400 x 305

Snowsphere 400x305

Medium

Approximate size in pixels = 800 x 615

Snowsphere 800x610

Large

Approximate size in pixels = 1200 x 915

Hero Image

Approximate resolution size in pixels = 1800 x 1000

File size < 400KB