If you want to see the true size after it's saved, look at the file properties in Windows Explorer, since that will give the correct value. I don't know what you're doing if it's not animated to get that error - maybe you're not saving it in the right file format? You can still attach the too-large file here, since attachment limits are greater than avatar limits, then we can see what you're doing wrong, since that would be easier than you trying to explain something you don't understand.