The Mercy TAPE device (2D and 3D models) is intended for use by health care professionals to estimate the body weight of pediatric patients between the ages of 2 months and 16 years, using linear measurements from specific anatomical landmarks made with the TAPE device for humeral length (HL, for the 2D model) or half-humeral length (HHL, for the 3D model) and the mid-upper arm circumference (MUAC).