The length needs an extra inch to cover at the very bottom.  Also a tie at the bottom would be helpful.  Color and material seems to be fine.   The wand is really just a long piece of plastic pipe.  The sleeve for the pipe is sewn in but the whole pipe slips out of the sleeve, therefore the wand is not really sewn in.   A zipper from the top and bottom would help my umbrella is offset with an arm so I could only zip half way down even Velcro would help to go around a arm.