From the manufacturer sizing chart:
Buyer pays shipping, mute is located in Hartford CT.Nr.11: Alexander 164 kaiser tuba, Hirsbrunner York model 510, Holton 345 B-, C-tuben, Kalison large B-, C-tuben, Kanstul 6/4 tuba, Melton/Meinl-Weston Alan Baer 6450, 2265, Fafner 195, York (Grand Rapids, USA) 6/4 B-, C-tuben
Open to trades for a size 12 mute


