This also applies if you are a small, junior or petite size in womens clothing. Sometimes it can be less expensive to buy large or Xlg clothing in the children's section. :
UGG Classic Ultra Mini Water-Resistant Booties | Dillard's
UGG® Sizing Information | UGG® Official
UGG Ladies Size 6 Boots- Non Smoking Home for Sale in Columbia, SC - OfferUp