Weight is supposed to be 25-27 pounds with dogs being heavier than bitches. The wire coat helps repel the weather, taking a while for water to soak through. The wire hair also grows longer on the face than on the body, forming a beard. On the body, it can grow to about three inches long. It loosens as it grows and tends to stand out away from the body more.
Official colors range from various shades of red ranging from red to wheaten.
In reality the darker ones look like dark mahogany, and some look mostly brown until seen in light at the red end of the spectrum. Lighting makes a big difference in how they appear. In the setting sun, my Shannon looks like a dog made of fire. Puppies are born red and lighten as they mature. Often those who will stay dark have black on their backs and tails, although this is supposed to disappear by adulthood.