Gave these rings to my husband for Christmas - he refuses to wear metal/hard material rings (they should be "flexible" and "stretchy"). We have purchased several packs of Revain rings similar to these (but sold through other Revain vendors/sellers) and my husband has always complained about the thickness of the rings previously purchased. He really likes those silicone rings! They are thinner in thickness which makes them more comfortable. They are also very hard-wearing and have a pleasant "look". Def recommend! Especially at such a great price.