Beginner Trumpet Mouthpiece Size Guide
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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For a beginner trumpet player, the standard mouthpiece size is 7C. Start with 7C, since it is the size the beginner sets are built around.
Start with a 7C mouthpiece
The 7C mouthpiece is the size that comes with beginner trumpet sets. The Vangoa, JAMELO and EASTROCK sets each include a 7C mouthpiece, and the Yamaha set includes a mouthpiece with the trumpet. When you buy a beginner trumpet, check the listing for a 7C mouthpiece before anything else.
What the letters and number mean
The 7C name is a size code, not a measurement in inches. The letter and number together name one mouthpiece size, and the Vangoa listing adds that its 7C has a medium cup design. Compare mouthpieces by their size code, since the code is how listings name the size.
Match the mouthpiece to the trumpet
The EASTROCK set lists a silver plated 7C mouthpiece with its Bb trumpet, and the JAMELO set lists its 7C mouthpiece in the same kit. Use the mouthpiece that comes with the trumpet, since it is sized for that instrument.
Check the cup size in the listing
The cup is the part of the mouthpiece the lips rest against, and the Vangoa listing describes its 7C mouthpiece as a medium cup design for new players. Read the listing for the cup description as well as the 7C code, since the code names the size and the description names the cup. A medium cup sits between shallow and deep, which is why the listing pairs it with players starting out.
Care for the mouthpiece after playing
Rinse the mouthpiece with warm water and mild soap, then dry it with a soft dry cloth before you put it back in the case. The Vangoa set includes a cleaning kit and a cleaning cloth, and the JAMELO set includes a cleaning cloth with its 7C mouthpiece. Keep the mouthpiece in the case with the trumpet so it stays with the instrument.
What you need
Yamaha YTR2330 Student Trumpet
A Bb student trumpet in silver finish with a two-piece yellow brass bell, Monel valves and a mouthpiece and case included.
- Case or gig bag included
- Mouthpiece included
- Key: Bb
- Finish: Polished
- Valves: Monel
Vangoa Student Bb Trumpet
A Bb student trumpet with a 7C mouthpiece with a medium cup design, a 4.8-inch bell, stainless steel valves and a hard case.
- Case or gig bag included
- Mouthpiece included
- Key: Bb
- Finish: Lacquered
- Valves: Stainless Steel
- 1 year warranty stated
JAMELO Bb Standard Trumpet Set
A Bb trumpet set with a 7C mouthpiece, carrying case, gloves and cleaning cloth, built from brass with a polished finish.
- Case or gig bag included
- Mouthpiece included
- Key: Bb
- Finish: Polished
- 1 year warranty stated
EASTROCK Bb Trumpet Standard Trumpet Set
A Bb trumpet set with a silver plated 7C mouthpiece, tuning rod, gloves and hard case, with a 4.92-inch bell and black nickel finish.
- Case or gig bag included
- Mouthpiece included
- Key: Bb
- Finish: Black Nickel
- 1-year warranty stated
These come from our ranked list Best Beginner Trumpet, which compares them spec by spec.
Frequently asked questions
What mouthpiece size do beginners start with?
A 7C mouthpiece. The Vangoa, JAMELO and EASTROCK beginner sets each include a 7C mouthpiece, so it is the size to start with.
What does 7C mean on a mouthpiece?
7C is the size code for a beginner trumpet mouthpiece. The Vangoa listing adds that its 7C has a medium cup design, which is the cup depth for new players.
Does a beginner trumpet include a mouthpiece?
Yes. Check the included components on the listing to confirm it.
Can I use a different mouthpiece size later?
Yes. Start with the 7C that comes with the trumpet, since the beginner sets are built around a 7C mouthpiece. A different size can wait until you know the 7C size well.
Ranked trumpets lists
More how-to guides
Product details come from each Amazon listing and can change. Check the listing before you buy.