Rorschach is 5'6' tall and weighs 140 pounds, and, as Walter Kovacs, he appears as a red-haired, expressionless, man who always carries with him a sign that reads THE END IS NIGHT.
Rorschach's mask, which he considers his true face, is a part of fabric made from a material derived from the technologies of Dr. Manhattan, and it is blank except from the front, where two viscous liquids, one black and one white, are between two layers of latex. The liquids continually shift in response to heat and pressure, which explains why the liquid only animates when Rorschach puts it on his face.