After ordering a plastic device to get the exact sizing I took the plunge to order a titanium device for permanent wear. Yes it's expensive but sooo worth it. Yvonne and her team produced a magnificent piece of art. My Goddess was truly delighted with it and pleased to have Her name engraved on it. Mine has two sets of spikes at the tip end and they truly bite hard whenever I have naughty thoughts. With this material it is easy to wear for a month without removal for scale cleaning and can be washed daily while on. Yvonne always kept me updated during the six week process. She's always there answer any question. Thanks to her again.