You may find menstruation practices that are depressive, and will not leak during your lesson...you are unsure to focus on your lesson.This is an original Japanese sanitary panties that are made with smooth and high quality. Sanitary Shorts Size Chart: S: Waist 18.9 - 23.6 inches (48 - 60 cm), Hip 27.6 - 31.5 inches (70 - 80 cm), Jr - Adult Slim Size M: Waist 22.0 - 27.6 inches (56 - 70 cm), Hip 3.5 inches (75 cm), Size (81 cm), Size (81 cm), Size (81 cm). Size S Staff B: Height: 5 ft 5.7 inches (167 cm), Weight: 109.3 lbs (49 kg), Waist: 23.6 inches (60 cm), Hip: 33.9 inches