About size: In china, If we named them as 8 mm, they should be more than 7mm for example 7.1mm 7.2mm… If we named them as 9 mm, they should be more than 8mm for example 8.1mm. If we named them as 10 mm, they should be more than 9mm for example 9.1mm 9.2mm… If we named them as 11 mm, they should be more than 10mm for example 10.1mm 10.2mm… I can make it as pendant, earring or others if customers request, thanks! If for any reason you are not satisfied, you may return the item to us within 14 days of receiving the item. I hope you can love my items and do more business with me in the future, thank you very much!