The Tibetan Mastiff is a large Tibetan dog breed. Its double coat is medium to long, subject to climate, and found in a wide variety of colors, including solid black, black and tan, various shades of red (from pale gold to deep red) and bluish-gray (dilute black), and sometimes with white markings around its neck, chest and legs. According to the American Kennel Club, male Tibetan Mastiffs have a weight of 40-70 kg (90-150 lbs) while females are 30-55 kg (70-120 lbs).
Image credit: Svenska Mässan from Sweden, CC BY 2.0
Adapted from Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Tibetan_Mastiff