ordinary pocket for many navigation devices

Hard Case for my TomTom Start with 4.3 inch display.
I can leave the holder with turn at this Navi even, but only the holder
from the TomTom gooseneck mount. Case is made like a kind of bag,
so with thoughts and feelings. Property me the strap to the zipper made in order
to carry the bag it and open it. Because of the small zipper is for my
big hands a little too dainty.
Purchase recommendation