The basic size is palm-sized, and the thickness is about 8 millimeters. It's a coarse sponge. However, this is a set of 10 "defective" sponges that are smaller, thinner, thicker, or have irregular shapes than the basic size! *The photos are examples. Although they are defective, they are individually packaged and in unused condition. If they are dry, they will soften when soaked in water, so please use them with confidence. As this is a defective product, please purchase it if you don't mind. This is a different type from the "Facial Sponge Defective 10 Pieces" that I am selling. If you want to buy 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.