These are scissor inserts for the Ultimate and Signature wood blocks from Cutco.

We had two pairs of scissors and I wanted something that made them fit better than just in the wooden hole. The upper insert is 22.5mm x 25mm, and the lower insert is 20mm x 20mm.

I printed them with the lip on top so I could iron it. If you do that, you'll want to add some tree supports. You could also print it upside down, with the lip on the bottom.