This model comes from requests for a toy that could act as a training device and is the first attempt at such a toy. The 3 sculpted fingers at top are life sized and mimic the sensation of an outstretched hand. Learning to enjoy and work through feelings of pressure deep inside can be a major hurdle for many. The 3 humps allow direct feedback on progress. The cross-section was made in an oval to offer the best fit. I equate the feeling of this one to a medium hand.