I accidentally bought a Madrid storage box (38x14x11, 3.5 L) at the HEMA with a closing clip/handle missing, so I created a new handle.

Dimensions: 78 x 33 x 16 mm

The print works for me, but might need some tweaking to be a perfect fit. The clips that attach the handle to the box are a bit too short and tight. Furthermore, the clip itself is grabbing the lid quite firmly, which I would loosen up a bit in a next iteration.