Purple alpaca sweater

No size tag, it fits me (size med) but I have a wool sensitivity. Could be cute looser on a size small person. Length is short - 16" front, 18" back. Knit detail is three different stitches (apologies to any knitters-or if it's actually crocheted - I don't know the difference!). I think I bought it years ago at an anthropologie but never wore it