Corona de Navidad - Christmas Weath - site is in Italian, but there is a translator. It doesn't give directions. I'm guessing wrapping yarn/jute around a styrofoam wreath. Use of a Sizzix, cut wood imbelishments, and purchased flowers.
For a Mason jar gift you can make in bulk, try these easy candles. Wrap the jar with wide plaid ribbon. Secure with three jute strings tied in a bow. Hot-glue a pinecone and artificial greenery to the bow. For a final touch, wood-burn a snowflake or polka