Fits nicely, printed in Eryone Silk Silver PLA.

I would not waste plastic on this when the environment is important. There is a solution that is much simpler and quicker:
https://www.youtube.com/watch?v=hAcN-823SMg
https://www.youtube.com/watch?v=5h_wfQRYpa4
All other solutions (stretching, forcing, gluing etc.) are unnecessary
@DVS_262302 Thats very good - thank you for sharing
Fits perfectly and does what it should. The fit could be a little bit tighter.
Only problem: My daughter already figured out how to remove it.