There are 4 cup sizes. Cup A is the smallest and Cup D is the largest. Pack of 4, one of each size. The 7 pack is NOT the largest D cup which is perfect for the legs and kneecap. Pack of 7 has 2 C cups, 2 B cups and 3 A cups. I am returning the set of 7 because it doesn't have the largest D cup. I really like using cups. Along with using a cold compress to reduce inflammation, heat to speed healing, massage, and stretching/strengthening exercises, using a large D cup really helped relieve pain and stiffness in my knees. Apply some cocoa butter to your body and apply a thin layer of cocoa butter to the rim of the cup. After suctioning, move the bowl up and down on the body part to be treated. Putting the shell on and leaving it in place creates round welts, but leaving it in place for just a few seconds and basically moving back and forth slowly doesn't scar me. I really like my set of 4 mugs. I recommend this product. The top row of cups in the image shows OD measurements in a 4-pack. The middle and bottom rows of cups show AC sizes in a 7-pack.
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