It's a medium size, a little bigger than I thought but manageable. I wore it out and about and it stayed in, even though I had doubts because there's not much of a difference in diameter at the base. The screw part is fun, but more because of the ridges than the actual screw part. Overall a nice surprise. It's a keeper!
Silicone, great size, great feel.
this was absolutely misleading. the spirals and ridges are WAY deeper than they look. i'm a medium experienced analist and this was so uncomfortable IT MADE ME BLEED. the rubber is NOT SOFT or cushy. there is NO GIVE with it and i almost felt my perineum tearing. absolutely DO NOT BUY THIS unless you're EXTREMELY EXPERIENCED. my advice is to head over to DOC JOHNSON and get yourself a CRYSTAL JELLY. now those are COMFORTABLE :)