The objective of this study is to apply the NHTSA Biofidelity Ranking System (Rhule et al. 2002), to child-sized side crash test dummies. This study applies the methodology of the NHTSA system and adjusts the test condition weight factors appropriately for child-sized side impact dummies. Test response corridors scaled by Irwin et al. (2002) and Van Ratingen et al. (1997) were utilized for dummy comparison. Additional adult response corridors for the shoulder were scaled using factors derived by Irwin et al. (2002) and response corridors given by Bolte et al. (2000). This ranking system quantifies the ability of a child dummy to load its environment as a cadaver does, External Biofidelity, and to replicate the scaled cadaver responses that are used to predict injury potential, Internal Biofidelity. The Q3s 3-year-old side impact dummy is used as an example in the side impact child biofidelity ranking system.