Tiger's Eye: Approximately 9.8mm Rutile: Approximately 6.6-7.1mm Inner Circumference: Approximately 17cm The tiger's eye has a blue and brown bi-color. The appearance changes slightly depending on the angle. There is a small stone mark at the arrow. Please understand that this product may have natural stone characteristics such as black spots, cracks, dents, stone marks, distortions, and inclusions before purchasing.