Jackalope Dog Chews Naturally Shed Elk Antlers Size X-Large, Average 10-11 Inches Our elk antlers are found, crafted and shipped within our family business. We tend to be a bit generous on the sizes to ensure your pup gets long lasting use. Elk antlers are a great source of Vitamins such as: Calcium, Phosphorus, and other nutrients that support bone, teeth, and joint health Last weeks and weeks!