"The maximum file size for non-animated images is 20MB. The maximum file size for GIFs is 200MB.Non-animated images over 1MB for anonymous uploads and 5MB for account holders will be lossily compressed. All non-animated images receive lossless compression that reduces filesize while maintaining quality.
Large GIFs will be converted to GIFV, which shrinks file size while maintaining high quality.
TL;DR: You can upload really large images on Imgur."