Photoshop shows both - inches and pixels. I could use 640, provided I remember it's 640 and not something else, like 620 or other pixel widths.
If I really feel the detail is worth it, I just leave it alone and happily put them in thumb tags, but I was shooting for the biggest I could have without needing to use thumb tags or forcing the horizontal scroll bar. 9" doesn't make a horizontal scroll bar pop up on my monitor in IMWAN, but not all monitors are equal, I guess. I just thought we discussed this before and decided 9" was that limit - biggest I could go without using thumbs or horizontal scrolling.
But if it's 640, I'll try to remember that and use that.
Older images, of course, won't be remade, but newer ones could be smaller. Reused older images, already hosted on imgur but used again in newer posts, will probably still be 9", so whatever occasional problem that causes, this will still come up now and again.
Newly made images will be 640 pixels wide, so I'll try to make that happen.
