The twist in the main part of this toy doesn't add a whole lot of extra stimulation, but it may do more for more sensitive users. At the widest point, I measured 1 and 3/4 inches, but the official diameter is 1 5/8 inches. Other than this girth, it's a good toy for a user of any experience level. While it doesn't exactly look like a "my first black penis" dildo, the Bet on Black is pretty obviously a sex toy, and not the easiest to disguise as something different. If traveling with this toy, remember to remove the batteries, as there is no off-locking feature for the vibrator. Rubbing or sliding against something could turn it on.