Material: Silver 925 (stamped) Stone: Amber Measurements taken by a non-professional, please excuse any inaccuracies. ・Amber diameter: approximately 10mm ・Ring diameter (inner diameter): approximately 18.5mm (Measuring the inner circumference with thread is about 570mm, so I believe it's approximately size 17-18.) ・Ring width: approximately 5mm Purchased in Bangkok, Thailand about 20 years ago. It's simple and lovely, but I haven't worn it, so I'm selling it. There are minor scratches from storage, but that adds to its character. Please enjoy it as an antique ring. This is a used item, so please refrain from purchasing if you are looking for perfection.