Well you uploaded it to imgur, easiest way to do it is to just add t, s, m, l to the URL so for example your URL is: VvAyN4D.jpg
S:
T:
M:
L:
And then you go 1 more step which links it to the original sized image by wrapping the image in a URL code (click on any of the scaled ones for example!). So it would look like this -- [URL="insert original image URL"][IMG]insert scaled image URL[/IMG][/URL]
Magical.