The 1 1/4C is one of the largest sizes in the Bach Classic lineup. Its wide rim and medium cup give you a big, broad sound, and it's a popular choice for advanced players who have the strength to fill it.

Reading Bach mouthpiece sizes

• The number tells you the rim diameter. Lower numbers are larger, so a 1 1/4C is bigger than a 3C, which is bigger than a 5C or 7C.
• The letter tells you the cup depth. C is Bach's medium cup and the most popular all-around choice.

No two players have the same lips or teeth, so the right size is personal. If you're not sure, we're happy to help you choose.

Specifications

• Series: Bach Classic
• Size: 1 1/4C
• Rim: large diameter
• Cup: medium depth (C)
• Fits: Bb and C trumpet
• Construction: one-piece, CNC machined from solid brass to within one ten-thousandth of an inch
• Finish: silver plated

The Bach Classic Series

Bach began with mouthpieces. A century ago, trumpeter Vincent Bach started designing his own after a broken mouthpiece, and he kept refining them until settling on the standardized designs that became today's Classic Series. Bach Classic mouthpieces are the most played mouthpieces in the world.

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WARNING: Brass instruments and their accessories can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm, and Nickel, which is known to the State of California to cause cancer. For more information go to:

www.P65Warnings.ca.gov

Most new instruments and accessories over $75 are eligible for free shipping to the continental US.

Thein instruments, tubas, and pre-owned instruments are excluded from free shipping.

Click here for our full shipping policy.

Most products sold in the United States receive a 15-day return policy that starts on the day the customer receives their order. The customer is responsible for the cost of initial and return shipping, except in the case of new French horns, trumpets, and trombones, which will receive free return shipping from 48 US states. There will be a $5 cleaning fee for each returned mouthpiece.

Some product categories are ineligible for return, which include special orders, sheet music, consumables such as lubricants or cleaning snakes, and personal items such as clothing or face masks.

Unfortunately, as of May 12, 2025, we can no longer offer returns, exchanges, or refunds to international customers due to the tariff situation. We hope to restore international returns soon.

See the policy links at the bottom of our website for more information.

Click here to request a return.

Any product labelled "Special Order" is a final sale, no refunds or exchanges. Likewise, any product that has been customized at the customer's request can no longer be returned.

Click here for more information on special orders. If you want it, we will try our best to get it to you!