I have been crocheting one...don't really have a pattern written out but here goes. After you crochet this you will need to felt it. Just throw in the washer and dryer with some jeans or weight like clothing. Watch carefully, and have your doll handy to try them on. If it is not small enough throw in the dryer and check after 5 minutes until it fits!
Chain 8 with worcestered weight WOOL yarn. do several rounds of single crochet adding increases so your sole lies flat, when it measures about 3.25 inches long, begin a round of double crochet, decreasing about every 3rd or 4th stitch so this becomes an upright band around the sole. Make a 2nd row, and then slip stitch all the way around the top 2 times. At this point it should look something like a shoe! Good luck!