Weighing 26 to 40 pounds and standing 42 to 55 centimetres at the withers, the Portuguese Sheepdog is a mid-sized herding dog. It has a well-proportioned head with a nicely defined stop and odd muzzle surrounded by furs that earned its nickname "monkey dog". It has round, dark eyes with a calm, alert and intelligent expression. It has moderately long ears that boast of having fine leathers set high and hang to the cheeks. Its nose is black, slightly raised with large, wide-open nostrils.
The Portuguese Sheepdog boasts of a long single coat that is either straight or wavy and is quite harsh to the touch. The long hair forms a moustache, eyebrows and beards all over its face. It also has long hair throughout the body especially on the legs, including between the toes. The breed wears various coat colours that include yellow, grey, chestnut, fawn, and wolf grey.
The coat needs to be brushed a few times a week to stay matt-free. Pay close attention to its moustache and beard since food can get stuck after it has eaten; wipe it with a clean and damp cloth. The breed sheds steadily all year round and especially during autumn and spring, so frequent grooming is needed. Aside from coat care, dog grooming also includes dental care, nail trimming and cleaning of the dog's ears.