The Monster Makers Life Size Female"Alanna Head" 2.0 Head Armature for Mask Making and Clay Busts Measures 18" H x 13" W x 10"D. Head circumference at brow is 23" approx. Head Circumference at Brow is Approximately 23" World's First Water-Fillable Sculpting Bust Made of a Special High Density Plastic Designed to Withstand the Rigors of Mold Making RAD (Radiant Assisted Demold) Technology Dramatically Aids the Demolding Process