A real long shot but looking for a climber with a size 13 right foot & size 12.5 left. I'm the other way round. I've just bought both. The only way for me to get a perfect fit is to buy 2 pairs & keep the 13 left & 12.5 right ... Surely there's someone out there in the universe with the opposite problem?? Before choosing or returning I thought it worth a try..New of course & selling at a loss.