Oxballs ERGO buttplug to fits your hole right—it feels amazing ‘cause it hits the right spot, twist it and feel how it rubs your prostate, and the base is sized to keep this plug in... There is a reason it is our most popular buttplug—it feels amazing! Hand poured in small batches using liquid platinum cure silicone. Oxballs loves color, so we've added NEW platinum color to ERGO—it's a swirl of metallic platinum and black—kinda fancy for a toy you put in your butthole, but it is sexy AF and so much cooler than boring solid black! Each one is unique with cool color swirls . M : Length: 4.25”/ 10.795 cm Usable Length: 3.75”/ 9.525 cm Largest Usable Circumference: 6.25”/ 15.875 cm Smallest Usable Circumference: 3.75”/ 9.525 cm