I believe the best mouthpieces for beginners and intermediate are Yamaha (standard) or Fobes Debut. On tenor a slightly larger tip is better, so I would say for alto a Yamaha 4c, but tenor a 5c. Once you get to know a bit more about your set-up however it might be worth trying some other mouthpieces. Our own PPT brand are not really suitable for absolute beginners although the alto 5* is a very good upgrade from a 4c or Fobes.