My dd is desperate for a pair of Uggs and is currently 'watching' a couple of items on ebay. We're unsure about sizing - both are 'used' but in very good condition. She's a size 6 shoe but wondered whether it would be wise to bid on size 7, too. The auctions finish soon and she's in a complete flap about which to bid for!! If you've any Ugg experience, please help asap!! TIA.