Sorry guys, my GI Joe figures are all in the display cabinet at my parent's house... but, I can tell for certain, that a GI Joe figure is a forhead, if not a whole head, taller than a klicky. and its certainly slimmer
So the klicky fits on the Flagg as long as hight is concerned but its a bit bulky compared to the delicate gi joe figure... at least the old 80's early 90's figures.. because the late 90's and 2000 until todays gijoe figures ... are not that good quality made.