Door Bumper

This 3D-printable door stop prevents your door handles from leaving marks on your walls when swung open. Model is 40mm in diameter at the base, ~31mm in diameter at the top, and 15mm tall. I secured mine using 3M Super Strength Molding Tape as shown in the last image. You could also use a trimmed Command Strip or double-sided tape if you want them to be less than permanent or renter-friendly.