Robbie doesn't fit under the sofa - looking for ideas to raise it

Hello everyone,

our robot vacuum (our daughter calls him Robbie) does not fit under the sofa. We would like to change that. It's only about 1.5 cm that are missing. Ideally, we would have something that can be placed under the feet; replacing the feet is difficult due to their size and shape. The round feet have a diameter of 40mm. Everything I find when I google coasters or similar only raises by a few millimeters. If possible, it should not be very noticeable either, since the sofa's feet are quite close to the edge and therefore visible.
Does anyone have an idea or advice?

Best regards
Tarnari

What are the feet made of then? BILD?

Either put wood underneath or foam rubber.

Wood or foam rubber (just as I imagine it) is already very unsexy. Here's an impression. Please ignore the mess, we are in the middle of packing for the move. Sorry for the rotated picture.

No matter what you put underneath, it will all look "unsexy" as you write. If anything, you have to install completely new feet, or maybe lower the Robbie :D

I bought hockey pucks for that.

These feet are no beauty anyway. Dismantle them and put something proper underneath. Easy