Rapid Review Anatomy Reference Guide Power Massagers 6" Above Mid Knee 6" Below 6" Above Mid Knee 6" Below X Small 12 1 4" 13 1 4" 11 1 2" 12 1 2" 10 3 4" 11 1 4" Small 14 1 2" 15 1 2" 13" 14" 11 3 4" 12 1 4" Small Medium 15 1 2" 16 1 2" 13 1 2" 14 1 2" 12 1 2" 13 1 2" Medium 16 1 2" 17 1 2" 14 1 2" 15 1 2" 13 1 2" 14 1 2" Medium Large 18" 19" 15 1 2" 16 1 2" 14" 15" Large 19 1 2" 20 1 2" 15 1 2" 16 1 2" 14 1 2" 15 1 2" Large X Large 20 1 2" 21 1 2" 16" 17" 15 1 2" 16 1 2" X Large 21 1 2" 22 1 2" 16 1 2" 17 1 2" 16 1 2" 17 1 2" XX Large 22 1 2" 23 1 2" 17 1 2" 18 1 2" 17 1 2" 18 1 2" Waveform: Biphasic square pulse with negative spike Designed for high school and college level students 28 sections feature commonly taught anatomical and physiological concepts including basic facts location histology key terminology and structure identifications