Balu Mute question

[ajacobus]

Hey everyone,

I'm considering buying a Balu mute, I hear they are very popular and sound great. I was wondering, since I play a 6/4 CC and the tiny Yamaha YFB-621 F, would anyone be able to tell me if the standard size would fit both? Or whether the XL size would fit in the small F? Balu recommends the XL mute for 5/4 and 6/4 tubas, but I'm worried the XL won't fit in my F..

Any thoughts?