Packaging for a tailor's measuring tape

Measuring tape reel. Adapted to a tape of approximately 16mm.
Assembly method:
-Place the measuring tape on the element to be taped in the dedicated groove 
-Then extend the end of the tape through the housing 
-Close the box carefully, pressing the housing lightly against the mechanism (the knob should be on the table side and the housing should be pressed from the top)

Boost Meit will support me to continue working, thanks ;)