The shape of the nose varies widely due to differences in the nasal bone shapes and formation of the bridge of the nose.
Some nose shapes were classified for surgeries by Eden Warwick in Nasology 1848:
Paul Topinard developed the nasal index as a method of classifying ethnic groups.
The index is based on the ratio of the breadth of the nose to its height.
The nasal dimensions are also used to classify nasal morphology into five types: Hyperleptorrhine is a very long, narrow nose with a nasal index of 40 to 55.
Leptorrhine describes a long, narrow nose with an index of 55–70.
Mesorrhine is a medium nose with an index of 70–85.
Platyrrhine is a short, broad nose with an index of 85–99·9.
The fifth type is the hyperplatyrrhine having an index of more than 100.

Some deformities of the nose are named, such as the pug nose and the saddle nose.
The pug nose is characterised by excess tissue from the apex that is out of proportion to the rest of the nose.
A low and underdeveloped nasal bridge may also be evident.
A saddle nose deformity involving the collapse of the bridge of the nose is mostly associated with trauma to the nose but can be caused by other conditions including leprosy.

Werner syndrome, a condition that causes the appearance of premature aging, causes a "bird-like" appearance due to pinching of the nose.

Down syndrome commonly presents a small nose with a flattened nasal bridge.
This can be due to the absence of one or both  nasal bones, shortened nasal bones, or nasal bones that have not fused in the midline.
The shape of the nose varies widely due to differences in the nasal bone shapes and formation of the bridge of the nose. Some nose shapes were classified for surgeries by Eden Warwick in Nasology 1848:
Paul Topinard developed the nasal index as a method of classifying ethnic groups. The index is based on the ratio of the breadth of the nose to its height. The nasal dimensions are also used to classify nasal morphology into five types: Hyperleptorrhine is a very long, narrow nose with a nasal index of 40 to 55. Leptorrhine describes a long, narrow nose with an index of 55–70. Mesorrhine is a medium nose with an index of 70–85. Platyrrhine is a short, broad nose with an index of 85–99·9. The fifth type is the hyperplatyrrhine having an index of more than 100.
Some deformities of the nose are named, such as the pug nose and the saddle nose. The pug nose is characterised by excess tissue from the apex that is out of proportion to the rest of the nose. A low and underdeveloped nasal bridge may also be evident. A saddle nose deformity involving the collapse of the bridge of the nose is mostly associated with trauma to the nose but can be caused by other conditions including leprosy.
Werner syndrome, a condition that causes the appearance of premature aging, causes a "bird-like" appearance due to pinching of the nose.
Down syndrome commonly presents a small nose with a flattened nasal bridge. This can be due to the absence of one or both  nasal bones, shortened nasal bones, or nasal bones that have not fused in the midline.
Human nose