I wear size 8 in this brand. I have a bad knee that affects my ankle and that can lead to foot pain on one side. Love this brand, but for some reason the sizing had changed. I compared my old pair of Asics that are a size 8 and my new ones are shorter. So I will have to send these back as I can't wear them on concrete floors at my one job. I will be ordering a bigger size tho. Shopping was fast and I love this brand.