This masturbation sleeve has a textured nubby interior and is stretchy to fit all sizes. It has openings on both sides and is easy to clean. Add some water based lubricant to enhance sensation or even a warming lubricant for a heated sensation. Can be used for solo play or during foreplay!Measurements (approx.)Length: 5.3 in. / 13.5cmInternal Length: 5.1 in. / 13cmWidth: 2 in. / 5cmInternal Diameter: 1.2 in. / 3cm + stretchWeight: 3.2 oz. / 90g