Swing Bak Foam Roller "DOCTOR DESIGNED & ATHLETE ENDORSED" INDENTED CENTER "BONE-ZONE" FOR SPINE AND NECK COMFORT RAISED PRESSURE NODES AND END DISCS FOR ACUPRESSURE AND TRIGGER POINT RELIEF 2 LENGTHS  Standard Dimensions are 21" long by 6" diameter. Travel Size is 15" long by 6" diameter. 3 DENSITIES  Green-firm, Orange-medium, Yellow-soft.