DrQuackner, Thank you. I made it from 3 pieces. Outer side pieces are 1/4” and I put 2 of 2mm thick/5mm round magnets on each piece.  the middle piece is 1/8” and I cut out the shape of the knife blade. Then, I glued them to finish.

Brit, Thank you! it was a super quick project.

No name noobie here