Size of mouthpiece can indeed make a difference.

One example, someone with a larger than average embouchure might find out that the average cup size and especially depth makes it impossible to play in the higher registers or even in the staff with volume and power if the air velocity pushes the larger lip tissues up against the inside of the mouthpiece wall.

There are other reasons to find and use the best fit for your particular facial muscles and lips, too.

Longevity comes to mind, as well as the fact that certain situations could indeed cause permanent damage to facial musculature and bone structurses which would be detrimental to playing abilities over the long term.

And -- unless you can buzz the entire Star Spangled Banner, in the air, with no mouthpiece or anything else pressing against your lips, you don't know how to work the trumpet yet.

For the instrument itself is nothing but a resonant amplifier for your face.


--Mac