The base inner diameter is 16. Only size down from inner diameter 13-16 is possible. If you want a size larger than 16, please confirm if it's possible before purchasing m(_ _)m Top 13mm, around 10mm ※ Purple Rose Quartz is a type of rose quartz, a rare stone with a pink color mixed with purple. It is said to enhance love luck, smooth relationships, heal emotional wounds and stress, and have the effect of keeping emotions calm. It is also said to boost self-esteem and promote the ability to love and accept oneself. ※ Peach Jade is said to be effective for love luck, relationships, and enhancing charm. It is also said to dispel negative energy and have the power to bring good luck, health, and longevity. Furthermore, it is said to promote mental and physical harmony and can be expected to have a relaxing effect. I'm posting videos on Instagram ▶︎ ichigohime__ Please read the profile before purchasing. Not compatible with metal allergies ( ´._.`) As it is completely handmade, please understand before purchasing. ※ Please check the images carefully and make your own judgment. If you have any questions or concerns, please ask before purchasing. Returns, refunds, and exchanges are not accepted after arrival. I am handmade! Please understand. If you are looking for perfection, please purchase from a shop. (※) Price includes shipping, packaging, and handling fees. (※) If you would like a discount or a discount for multiple purchases, please leave a comment. If there is no comment, it will be rejected. Please also read the profile (♡ᴗ͈ˬᴗ͈) I do not accept custom orders, only size adjustments.