Please reference the list below whenever you’re creating new images for your site. You should find a size for all possible images you’ll need/use.
Home Slideshow/Hero: New hero images are at least 380 px high by at least 1200 px wide.
Home Features: 600px × 600px
Featured Product Thumbnail: 400px × 400px
Page Block Images: 600px × Any Height (400px recommended)
Page Block Video Thumbnails: 600px × 400px
Header Image: 1410 × 535
Sidebar Images: 600px × Any Height
Sidebar Video Thumbnails: 600px × 400px
Blog Post Thumbnails: 800px × 525px
Blog images are listed in the style guide: 800×525. This size will keep any part of the image from getting cropped off when it is designated as a featured image. For other images, they can be 800px by any height to be full width in the copy area or >300px by any height if they want to float the images right or left.