Black Lululemon long down filled parka size 8?

Long down filled parka Detachable hood 2 front pockets, on left pocket, it does not zip, right pocket has zipper 2 inside zipper pockets 2 way zipper, so it can be unzipped from bottom as well 21” put to pit 37” shoulder to hem Size tag is too faded to read but I think it is a size 8