How to choose between Nina, Helena and Stella? They do have similar shapes with small differences in shaft size. Nina is a twist-dial, battery operated plastic vibrator with the longest shaft. Helena is push-button, battery-operated, silicone coated, and Stella is push-button, rechargeable, silicone coated with a slimmer shaft than Helena. All of them vary in intensity and all deliver powerful, throbby vibration at the upper range. Helena is beautifully mid-priced, battery operated, with simple design and control options and a substantial enough shaft to be noticeable when used internally. Very similar to Luminance in vibration and color scheme. Now you just have to choose....
Size: 13/8" widest diameter with a 5" long insertable portion. Overall length 6.5".
Color: Cerise, Lime Plum, Tangerine.
Batteries: Two AAA batteries, included
Care & Cleaning: Splashable, use non-moisturizing soap and warm water to clean; do not use silicone lubricant