Detail 01
16mm cup diameter
The smallest cup in this range. Less lip area to support means easier high notes and less air demand.

Independent shopping perspective
Silver-plated cornet mouthpiece in the size 5 — a small cup with an open backbore, aimed at a warm, dark tone that stays responsive in the upper register.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
The smallest cup in this range. Less lip area to support means easier high notes and less air demand.
Detail 02
Moderately wide for the size, so it spreads pressure across the lip better than a narrow rim would.
Detail 03
Slightly tighter than the 4 and 4.5 sizes. Gives you resistance to lean on rather than a wide-open blow.
Detail 04
Lets the sound spread rather than focusing it. The V-type backbore on the 5B does the opposite — tighter and more projecting.
Detail 05
Sits away from bright and cutting. Good in a blended section, less so if you need to slice over a group.
Detail 06
Standard finish. Some players get a reaction from silver on the lip and switch to gold-plate.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same 16mm cup and 5.3mm rim. The 5 has a 4.45mm throat and open backbore for a warm, dark tone. The 5B tightens the throat to 3.97mm with a V-type backbore for a focused, full-bodied sound with more projection.
No. This is a cornet mouthpiece. Trumpet uses a different shank and won't take it correctly.
The small 16mm cup and tighter throat are what help there — it's built for good response in the upper register while keeping a warm tone rather than going bright and shallow.
The 5 is a smaller cup than the 4's 16.4mm, with a slightly narrower throat. Expect easier response up top and less of the 4's deep, rich body.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.