I made an updated visual chart to show the size difference between the four types of puffins (Tufted puffins, Horned puffins, Rhinoceros auklets and Atlantic puffins).
- Atlantic Puffins are tiniest at about 10 to 11 1/2 inches (25-29 cm)
- Rhinoceros Auklets are about 14 1/2 to 15 1/2 inches (37-39 cm)
- Horned Puffins are around the same at 15 inches tall (38 cm)
- Tufted Puffins are the biggest puffins at 16 inches tall (44 cm)
You can see the previous size chart here.