Practice your anatomy and figure drawing skills with Richeson Skeleton Models. These lifelike models feature removable arms and legs, joints that duplicate natural movements, and mouths that open and shut so you can use the models to create a variety of poses and images.v - Richeson Skeleton Models - Half Size, 33-1/2" TallSkeleton, HALF SIZE SKELETON 33IN - Ideal for figure drawing, these lifelike models have removable arms and legs. Joints are designed to duplicate natural movements. Their mouths open and shut. 33-1/2" tall and weighs 5 lbs.