I own a few Edward Green boots and shoes. I wear the same size on all the the Edward Green Lasts that I own 64, 82, 89, 202, and 888. Sapphire Renovateur is billed as a cleaner as well as a conditioner. I actually find it to be more of a cleaner since it always tends to remove some finishing when used. As a conditioner I tend to use Bick4.