The basic size is palm-sized, and the thickness is about 8 millimeters. It's a coarse sponge. However, this is a set of 20 "defective" sponges that are smaller, thinner, or have deformities compared to the basic size! *The photos are examples. Although they are defective, they are individually packaged and unused. If they are dry, they will soften when soaked in water, so please use them with confidence. Most of these 20 sponges are dry. They are generally thin sponges. This is a defective product, so please purchase it if you don't mind. They are a different type from the "new facial sponge defective 10 pieces" that I am also selling. If you want a large quantity, please contact me! *Depending on the number of pieces, the shipping method may change, and there may be an additional charge. Thank you for your understanding.