I'm a wide size 8 with a high instep so sized up to a 9. The boots arrived and looked beautiful...but my instep was just too high and I couldn't get the zip up. I packaged them up to return them but they were just too beautiful to part with. Then I had the brainwave of threading a ribbon through the zip to give a bit of extra leverage...and I managed to get them done up. Because the fabric has a bit of 'give' to it they stretched and are now my absolute favourite, comfortable, stylish, footware.