In form the vicuna resembles the guanaco, but it is smaller and slenderer. Its colour is not easy to describe and in South America people simply refer to “vicuña colour” which varies from pale fawn, through vermilion and golden to strongly fulvous. The vicuña has no black on its face as has the guanaco. From the throat to the knees there is a pure white tuft, the belly and inner sides of the limbs are white also. The vicuña stands from 28 to 35 inches (70 to 90 cm.) high at the shoulder, its average size decreasing from south to north. Its wool is shorter but much finer than that of the guanaco and is probably the finest and lightest wool in the world.