REI doesn't have my size in stock (its in a gap between kids and male adults), so I bought 2 pairs of shoes mail order. Similar styles, different manufacturers (Teva, Merrill). I got them both in size 7. They have arrived, and one feels a half size too large, while the other feels a half size too small. Sigh. It would be less annoying if they were off in a consistent fashion, thus the mistake would not reoccur with future purposes.