Do ugg boots run big in size?

Do ugg boots run big in size?
Hi,

I am buying a pair of uggs for my little sister for x-mas and i was wondering if they run big in size or small. She usually wears a size 8.

What size should i get her?

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There has been a dispute between manufacturers of ugg boots, as to whether "ugg" is a generic term and thus ineligible for trademark protection, especially in the region of origin. Deckers Outdoor Corporation holds the UGG Australia trade mark, but this is explicitly not recognised in Australia following a 2006 ruling.
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