"Perfect," Saula said, pleased that her guesses so far had been as accurate as possible, given her source for sizing information. She folded the sirwal and handed it over. "Now, slippers will be a bit harder to take a guess at, so I recommend you take the closest guess you possibly can, and then get that size, as well as one small, and one larger. I'll give you a receipt to return the two that are the incorrect size at full refund, as long as you return it within a week."