I want to share my fan-art (TF movie scale ) but it's large right now. I have an imageshack account, but what is the largest allowed size that will work on the fan-art page?
Why not upload it large and use the thumbnail preview? The boards will automatically reduce large images.
Well, 219MB is a bit excessive, and would likely crash any site you attempt to upload that to. Something around 500KB is much more appropriate.
Look at it this way, no art no matter how incredible is going to make someone wait for an hour or so to check it out. A sensible file size in that sort of region will get you more hits and feedback.