Good size
This I feel is more for things on the surface of the skin.  I don't feel like it penetrates deep into your muscles.  Better off using an ice pack.  That said,  my son loves using this for bug bites.  I like using it on my face if I feel it's puffy or irritated. The roller is very smooth. It holds the coldness for a good amount of time. It's a good item to have on hand for various needs.  It fits nicely in the door of my freezer.
Rating: 5 stars