Sorraias are always grullo or regular dun in colour. They have a dark muzzle and facial features, and have no “mealy mouth” or lighter colouring on the muzzle, as is usually seen in Fjord horses, for example. However, they do have two coloured manes and tails, with mixed dark and light hairs, in common with many Fjords.

Sorraias also have a dorsal stripe along their backs, and should typically show faint zebra striping, or barring, on the legs, neck and across the withers. 

They are usually slim, and have proportionally long legs. The head is long with a convex, or subconvex profile and the croup has a noticeable slope, similar to a donkey. The hip bones are often prominent, even in horses of normal weight and condition.  

Sorrias are usually between 1.40 metres (13.3hh) to 1.50 meters (14.3hh), but are nevertheless correctly described as horses rather than ponies. They have good, ground covering gaits and a particularly impressive trot.

Although Dr. d’Andrade considered Sorraias to be a type of wild horse and not a domestic horse, they can be trained, ridden and driven like any other horse.