I ordered scratch sleeves for hair pulling in my almost 3 year old. I ordered 2-3 but they were a little large on her and she worked out how to get them off by shaking her arms so I probably needed a size below. She hated wearing them and sometimes just the thought would stop her for a short while but in our experience they didn't work as she pulled her hair all the time and she couldn't wear them 24/7. I think for night they would have been successful if she had been happy to wear them but they caused her too much upset. However delivery and service was second to none and u would recommend still as others seem to have had a lot of success.