This Cairn Terrier Dog Breed Roller Pen "Best Friends" by world famous Artist Ruth Maystead is a charming intricately detailed design of the playful Cairn Terrier Breed.This pen measures 5.25" long 13 mm diameter and weighs 0.4 oz. It is black ink, medium point and has a gold tone cap with shirt clip. This collectible pen is a tribute to the loyalty and companionship of dogs, specifically showcasing the unique qualities of the Cairn Terrier breed. This pen would also be a functional addition to any dog enthusiast's desk or workspace.