This cover is adequate. It fits the Sony Xperia Z1. It looks quite smart when it is brand new - particularly if you remove the thong - but I cannot recommend it - it is made out of cheap faux leather and wears out too quickly.
I would have liked a less fiddly closure mechanism - trying to push a leather tab through a loop is infuriating when wearing gloves.
Before purchasing, be aware that this cover's faux leather material is not even slightly durable and, to make matters worse, it is impossible to remove dirt that collects on the inside of the flap. Within three months, mine has become rather ragged and I always try to look after my devices.