"Persephone"

The pearls on "Persephone" step up in size along the shaft, so you decide how far you go by stopping at whichever one still feels comfortable. Rocks-Off calls the slim profile welcoming for beginners.

Five pearls in ultra-soft silicone, 18.5 centimetres end to end, 78 grams in your hand. The T-bar base stays outside and gives you a grip, and the vibration starts there and travels up through every pearl rather than sitting in one spot. Seven settings, worked from the base.

Use plenty of water-based lubricant and take one pearl at a time, then draw them out slowly if you want the sensation on the way back. "Persephone" is waterproof and fully submersible, so the bath is fine. A size N battery powers it. Rocks-Off publishes the overall length but no insertable depth, so judge by the first pearl and go from there. Rocks-Off has a two year guarantee on it.