Good point. I guess I could do two 10 x12 on each side leaving the aisle still 10 feet. Im really wanting to make an aisle from the inside of the barn to the stalls so I don't have to go into the arena to get to the stalls. I don't know why I am caught up on having the stalls like that. The horses are going to be pastured majority of the time so stall use will be limited.