Henly Retractor - Improved Straight Arms - Side Blades Only 1 pair of side blades:Blunt 7/8" (2.2cm) wide by 1" (2.5cm) deep 1 pair of side blades: Blunt 7/8" (2.2cm) wide by 2" (5cm) deep 1 pair of side blades: Blunt 7/8" (2.2cm) wide by 3" (7.6cm) deep No center blades