This arm band was reviewed by my son. He goes to the gym everyday. He placed it on his arm with ease. I also tried it on my arm and it fit perfect also. He has an iPhone 5S and phone was nice and snug and protected. While working out he said it was comfortable and stayed in place while he worked out. He highly recommends it especially for the "Gym Fanatic" He used to keep his iPhone tucked in his pocket but the head phones sometimes got tangled. He has used it everyday since we received it. Great review. Good product !!!