The labels still tell us a bit about it. The blue is 218yds/200m per 100g which makes it something like a light worsted weight, or 10 ply in Aus/NZ terms. The whitish one does have a gauge on it which says 5.5mm needles. You could use a 6 or 6.5mm needle with it, and probably the same with the blue as well, though you might use the 5.5 with it. You'd need at least 4 or 5 balls of it for a sweater.
But it would still make a decent size shawl. There's lots of plain triangular ones where the texture of the yarn would be 'shown off'.
sue- knitting heretic