Currently, individual project images (including Project Covers) can be up to 50MB. Audio and video uploads are limited to 1GB per file. The limit for Profile Images is 1 MB.
Images 1400px wide and smaller will be displayed at the original uploaded size. Example: if you upload an image that is 1000px wide, it will display on Behance at 1000px.
Images larger than 1400px wide will display at 1400px but can be viewed at larger sizes when they're clicked within a project.