add some measurements to it.
Make it about 7.5 hds tall if you want to go realistic
legs up to the ball joint of the Humerus roughly 4 heads (the lower portion of the body - speak the legs - are in general longer than torso+head -depending where you make the cut - seediagram)
arms have a lenth of about 3 heads if they are stiff. Otherwise ~1.5 heads for the upper arm 1 head for the lower arm and 2/3 head for the length of the hand
Just named the most important points for the first one (which is realistic, but you might want to go with something more idealized)
take a close look at the chart, which should give you an ideal starting point.
Also consider that clothes, like shoes or hats are adding up.