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 Australia Classic Mini II Big Kids Boots Size 1 - Walmart.com
UGG® Big Kid Shoes (Sizes 3.5-7) | Nordstrom
UGG® Classic II Boot - Little Kid / Big Kid - Chestnut | Journeys
UGG® Kids' Classic Ultra Mini Boots (Youth) | Dillard's