I won’t tell you exactly how long this took, but it took a LOT longer than I had expected. It also took even longer AFTER I hung it because I initially made the balls too big and they popped the magnetic door open. Not good. So then I had to go through them all again and make them smaller. I then needed to make 3 more rows of balls. Before I made those three rows it was closing. After I made those three rows it didn’t close, so I threw in the towel and used packing tape along the top and bottom. Problem solved!
The moral of this crafting story is if all else fails, tape the heck out of it!