I bought one size up and they were still too small. There is this "sock-like" inner liner that doesn't have enough give to allow for a high arch foot. Never seen this from a reebok before. I'm switching brands after 25 years of reeboks!!!

UPDATE:  Switched to RYKA.  Fits perfectly as described.  Everything I used to love about reebok without the high price.  Check out Ryka, you won't be disappointed!!!