Scott, the creator of Square Peg Toys, describes the Kevin as follows:
Designed specifically to fit the exact request of a friend of mine, the namesake of the toy, combining the favorite aspects of several of his preferred toys all into one. The Kevin here was the original, while the Big and Little ones came soon afterwards. Things to note on this one are the length, the insertable part of which is about 10 1/2" to 11" depending on how far you press onto the base. Also, the circumference around the head is 8 1/2" to allow it into the second chamber if you are so inclined. Third, the balls measure 10 1/2" around, to give a really good stretch and work both the inner and outer rings at once. Curved for a more comfortable fit.
Approximate Dimensions: 12" Length, 8 1/2" to 11" Circumference.