This is a set of 3 cups which comes with a storage box.They are of medium size 5.5cm.They are used for Reducing Cellulite & Stretch Marks | Boosting Circulation & Relieving Muscle Pain | Relieving Headaches & Migraine | Promoting Relaxation & Relieving Stress | Stimulating Faster Healing | Improving general health and wellbeing.Cupping therapy has been used for thousands of years.They are very good quality.First of all you place on your body,make a tight seal,then move the cup along your body to draw the skin away.This helps with circulation, tones skin and tissues, and helps move lymph.It is safe to use almost anywhere on the body, including the legs, back, abdomen, chest, arms, neck, wrists, ankles and even your face.Nice little set worth purchasing.