Another option is to post your photo to Photobucket.com (or any other online site) and then insert a link to your photo preceded by "[img]" and ended with '[/img]" - but without the quotes. For example...
"[img]www.yourphotolink.com[/img]"
The benefit of doing this is you can assemble a single online library of all your photos and use the link to any photo anywhere and anytime. One photo can be linked to over and over. It doesn't consume storage on the site. It doesn't have any size limitations. Plus, if you ever want to remove your photos, just remove them from your library and they will disappear from anywhere they had been posted.
Here's an example...