Standard Size: 200 X 75 X [50 X 40] [90 X 75]  [D*H (l1*w1) l2*w2)] mm in which D = Diameter and H= Height; l1: Curvature Length; w1:  Curvature Width; l2:  Inner length and; w2 : Inner width in milimeters. 
Support patient's Face during surgery allows access to intubation due to its contoured features
No pressure to eyes especially in prone positions due to ergonomic design and elastomeric gel technology.