This was a Figure drawing of Roblox's R15 and R6 rigs, a figure drawing (if you live under a rock) is when you draw a character or generally any moving object or anything with a discernible backbone and skeleton, as it would as a skeleton, so draw the skeleton of the character.
In summary, R15, is about a 1/16 in shorter than R6, which is 3 1/2 of an inch, if we size it up to studs, (one stud = 10- 11 in) so, lets say that the inches are studs, 3 1/2 STUDS would get you 3 feet or 91 cm. So these guys are 3 foot. Short Kings Or queens or whatever.