Cool. Horde guard army in no time, put him to work!
Ref pic size it is really limited here, nothing over 1mb I think. I had to make all those Viking ones I took to be as low res as possible in order to load up.
I upload my pictures to Imgur. Quick and easy from the phone and gives you a bbcode link to drop in the forum. Add an ‘l’ to the URL before the .jpg and it automatically resizes to a sensible size.