Cup Size

What kind of cup size should I buy for my trumpet mouthpiece?

I want to buy a new mouthpiece for my trumpet and I am not sure with which cup size to go with. I want a mouthpiece that will help me hit higher notes. The mouthpiece I currently have is a Conn 7c and the highest note that I can consistently hit with it is a B above the staff. Which cup size would help me best improve my range?

You should either get a 14a4a Schilke or a Bach 3D, E, or F

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