Length will vary as these are vary large dense Tourmaline Logs but anywhere from 2.25" - 3.5" is a good estimate. Premium Grade, High Luster, Full of Energy! These great Black Tourmaline extra grade logs are wonderful protection stones and are ideally sized to keep around the house to repel negative energy - and they also make great display pieces. Perfect! Stones shown are for illustration as these are natural items please expect some variance from item to item. Stones supplied will be very similar but not identical. Posted pictures are to provide an idea of the typical mix of sizes and shapes available.