Exclusive to Deseret Book, these CTR rings are made of a high-quality silicone and designed for ultimate comfort and flexibility. Available in sizes 5-9. Made in the USA: Made with the highest quality materials to set the standard for luxury silicone rings Ultra Comfortable: Unique, flexible design for ultra comfort even with swelling fingers and hands Safe: Engineered with Anti Ring Avulsion Technology to break away and protect your finger Breathable Channels: Promotes airflow to keep your fingers dry and comfortable Product Dimensions: width: 4.3mm, thickness: 1.75mm