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 Kids Classic Clear Mini II (Toddler/Little Kid/Big Kid) | Zappos.com
Ugg Boots T harwell Child's Size 5 | eBay
UGG Children's Classic Short II Sheepskin Boots, Chestnut at John Lewis & Partners
What's the Difference Between the UGG Children's Classic and the New UGG Children's Classic II? - Englin's Fine Footwear
Save Big on Women's Shoes by Buying the Identical Kids' Shoe Size - The Krazy Coupon Lady
UGG® Australia International Sizing Chart | Skinnys | Ugg boots, Uggs, Kids ugg boots
Dick Smith | Outback Ugg Boots Kids Button - Premium Double Face Sheepskin (Pink, Size US 1-2 / EU 32) | Footwear » Slippers
Do UGG boots run big? How do you know what size to get? - Quora