Our shoe collections are universally sized to fit most 1/3 BJD and Smart Dolls.  The fit can vary depending on the size of the foot on your doll and whether you are using high heel feet or flat feet.  Some shoes will fit looser than others.  Boots you tend not to be able to tell as the foot is completely hidden inside, however dress shoes it is more noticable.  Adding socks or a bit of tissue paper can make all the difference.