These 'diamond' studs are quite small and perfect for a toddler or little girl. I tried them on my 2nd hole and felt like they were going to get lodged inside.  The clarity value is sort of pointless here because again, these are so tiny it's just not worth even talking about it. I received these for free and intend to give them to my 2 year old. I would not recommend them for an adult, or really at all for that matter. They are just not worth it.