I bought these to put in my new steel toe work boots. However, when i place them into the boot, it makes my boot not fit right. I wore them and by lunch time I had awful blisters due to my heel not fitting correctly with the insoles in. They are a little too thick for my workboots. However, they do fit just fine in my tennis shoes. So if you are looking to make your work boots more comfortable, and you own Justin steel toe work boots, these probably will not be the correct insoles.