thats the only way i can describe them! i keep seeing other women wearing them and i really want one!
i looked everywhere today in town and no joy. well i found one in house of fraser but it was 30 quid and i don't want to spend that much on a summer top which will be out of fashion next year.
they are about hip length and have no sleeves as such but your arms come through them almost poncho/cape style but they are stitched together to create kind of sleeves. sorry, i am aware this is a crap description 
they are often (but not always) in white lacey kind of material.
they look so lovely and summery.