Use these blister pads when you're on your feet, doing physical activities, or just going about your day. Ideal for anyone who wants to avoid blister pain. The blister pads come in three sizes: 2 x 2 3/4", 2 1/2 x 3/4", 2 1/4 x 1 1/2". They are made of 100% Hydrocolloid Gel and come in a hard - shell case with 15 pads in total (5 per size).