I'm originally a size 5, but everything I've bought on Amazon, I've had to buy on size 6.  When I put on these shoes, the tips of my toes jammed against the inside of the shoe....  Other than that, the left shoe had three problems, it scraped my achille's heel, it scraped beneath the bone of my ankle and it's tight right between the mid and forefoot, causing a wound right before the big toe begins. The right shoe, apart from being small, has caused no injuries...