Spray adhesive onto the back of the wooden round and let it sit for a few seconds until tacky.

Place the tacky side onto the back of your leather piece, then flip it over and press firmly to smooth the leather onto the wood.

Allow the adhesive to set for several minutes, then trim away the excess leather around the wooden round. For a more polished look, use a leather beveler to clean up the edges. Or, leave the edges raw for a more natural, rustic finish.