This is truly a one of a kind creation by RubyGlass21. The Tickler is a glass sleeve that smoothly slips over your finger. The design of this toy was inspired by a woman for external play of either the clitoris or opening the anus. The sleeve is in total length 3 inches long and made out of the best heavy walled glass. The diameter is 1 inch. The nubs on the shaft of the sleeve are added for extra pleasure and are raised about 1/4 inch. This toy is artfully created in the crystal clear glass with deep cobalt blue colored nubs. Each RubyGlass21 toy is made from the highest quality Pyrex glass; which is the only type of glass that has been proven to be safe to use internally. Every piece goes under quality control testing to prove that we are the top rated glass sex toy manufacturer in the world. Made only in the USA. One size fits most and for external use only.