Richardson retractors come in four standard blade dimensions—1 1/2" X 1 1/2", 1 1/4" X 1", 1" X 3/4", and 2" X 3/4"—all featuring a 9 1/2" total length that fits comfortably in the surgeon's hand. These proportions let medical professionals choose the right instrument based on the surgical area they're working with, whether tackling smaller, delicate regions or larger abdominal spaces that need broader exposure.