Uruguayan Criollo — compact, very strong and hardy horse of square format. One of the most squat and powerful lines among criollo breeds of South America. Height at withers 138–148 cm (ideal 142–145 cm), weight 380–480 kg, chest girth 170–185 cm, pastern girth 18.0–20.5 cm. Head relatively large, broad in the frontal part, with a straight or slightly concave profile (type «barb»), broad muzzle, large nostrils, large widely spaced eyes. Ears of medium length (110–140 mm), widely spaced. Neck short, very muscular, low set. Body broad, deep, barrel-shaped, with a short strong back, broad muscular loin, rounded powerful croup. Limbs strong, with short muscular forearms and shins, broad short pasterns and metatarsals, very strong rounded hooves (often black). Tail low set, thick, coarse, relatively short. Coat very thick, coarse, with pronounced undercoat. All solid and zebra-like (dun) colors are allowed; most characteristic are bayo (dun) of all shades with black belt and zebra markings, colorado, moro, zaino, tordillo, overo and tobiano. Differs from other criollo by more compact square format, massive bone, short limbs, coarse «wild» head, low neck set and pronounced pampas phenotype. Ideal proportions: body length ≈ height at withers, chest depth 50–52% of height at withers, head length 38–40% of height at withers, massiveness index 3.8–4.2.