S.E. Shires Trombone Mouthpiece: Small Bore
S.E. Shires Trombone Mouthpiece: Small Bore
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Made in the USA
S.E. Shires small-bore trombone mouthpieces offer five distinct rim and cup combinations for small-shank instruments. Choose from compact, shallow designs for lead playing through larger, medium-depth options for a broader sound.
Model guide
- 12C: A shallow C-shaped cup and compact diameter for a crisp, brilliant response in jazz and lead playing.
- 11C: A larger inner diameter than the 12C, with a medium-shallow V-C cup for versatile jazz and commercial use.
- 7C: A medium-shallow C-shaped cup for players who prefer a bowl-shaped feel.
- 6½ALS: The small-shank 6½AL, with a medium-depth V-C cup for general-purpose playing.
- 5GSS: The small-shank 5GS, with the largest inner diameter in this selection and a medium-depth V-C cup for a broader sound.
Measurements
The dimensions below follow the S.E. Shires small-shank mouthpiece chart. Inner diameters are measured at a depth of 0.065", as specified by Shires, so comparisons with other brands should account for their measurement methods.
| Model | Inner diameter at 0.065" | Throat | Cup depth / shape |
|---|---|---|---|
| 12C | 0.960" (24.38 mm) | 0.233" (5.92 mm) | Shallow / C |
| 11C | 0.990" (25.15 mm) | 0.232" (5.89 mm) | Medium-shallow / V-C |
| 7C | 0.970" (24.64 mm) | 0.238" (6.05 mm) | Medium-shallow / C |
| 6½ALS | 1.000" (25.40 mm) | 0.261" (6.63 mm) | Medium / V-C |
| 5GSS | 1.010" (25.65 mm) | 0.262" (6.65 mm) | Medium / V-C |
All models on this page have a small shank and a polished silver-plated finish. The 5GSS and 6½ALS names distinguish these small-shank versions from the large-shank models sold separately.
Specifications
Specifications
Cleaning & Care
Cleaning & Care
To keep your silver or gold plated mouthpiece looking brand new:
- Wash with warm water and soap, both inside and out.
- Wipe gently with paper towel
- Do not use abrasive materials like toothpaste
Prop 65 Warning: Risk of reproductive harm from exposure to lead. See www.P65Warnings.ca.gov

Quality You Can Measure
Every Pickett Brass mouthpiece is designed and manufactured in-house using proprietary CAD/CAM software and precision machining. Each mouthpiece is then meticulously measured, finished, and individually inspected to ensure exceptional consistency and flawless performance.