Hard to believe the quality you get for such a low price. Yes, as other reviews mention, they are VERY VERY VERY pinchy and you WILL need to use your fingers to stretch them open so they'll fit comfortably, but they are pretty easy to adjust. After working them with my fingers for a few minutes and figuring out how far I could open/bend them (a lot, they are super sturdy) I left them clamped onto a tin of Pink Cherry Arousal Balm. It's the perfect size to stretch out the rings without messing up the curve or risking making them crooked. I really am amazed at how adjustable these are. You can adjust them to pinch hard or just a little and you can set them anywhere on your nipple, closer to the tip or way back so you can tug the rings and they won't come off. A great choice for folks who aren't sure about nipple clamps but don't want to spend $30 on a fancy adjustable pair just to find out if they like it or not.