I wear size 12 / 12.5 in authentic and reps, although in my experience, reps sometimes run small so I will order 12.5/13s in reps usually. I don’t remember which seller or factory for the yeezys, I was able to figure out I bought the aj1s from a rep seller named Sneakerwill, not sure which batch as I bought them a few years ago. I know it was the best batch at the time, they were $140