All dogs, wild and domestic, are direct descendants of wolves. Dogs have been bred as pets and companions for thousands of years with the earliest known domestication taking place over 12,000 years ago. Today, dogs serve their best friend in several ways: as guides, home security, search and rescue, for hunting purposes, and to assist police in tracking criminals. There are over 400 recognized breeds of domestic dogs ranging from the smallest, the Chihuahua, to the largest of the breeds, the Irish wolfhound.nnSpecifications:nnFixed in place; not flexiblenThe photos shown are examples of what your specimen will approximately look like. Each spine is unique and will vary in size, shape, color, etc.nSmall Spine: Average greatest length is under 58.4 cm (under 23 in.)nMedium Spine: Average greatest length ranges from 58.4-73.4 cm (23-28.9 in.)nLarge Spine: Average greatest length ranges from 73.7-88.6 cm (29-34.9 in.)nExtra Large Spine: Average greatest length is 89 cm and up (35 in. and up)nGreatest length is measured straight across from the topmost to the bottommost partsnnThis is a made-to-order item. The turnaround time is dependent on the workload of our Processing team but generally takes around 2-4 months.