Kelly vs Marcinkiewicz Cornet Mouthpieces
Kelly offers 9 cornet mouthpieces (made in United States), while Marcinkiewicz has 71 models (made in United States). On average, Kelly cups measure 16.37mm versus 17.00mm for Marcinkiewicz. Below we compare both lineups side by side to help you choose the right brand for your playing style.
Kelly
Models9
Avg cup16.37mm
Avg throat3.87mm
Common styleGeneral
CountryUnited States
vs
Marcinkiewicz
Models71
Avg cup17.00mm
Avg throat4.26mm
Common style—
CountryUnited States
Kelly vs Marcinkiewicz — head-to-head comparisons
- Kelly 3C vs Marcinkiewicz 5*W (Endorsee)
- Kelly 3C vs Marcinkiewicz 1 1/4C (Endorsee)
- Kelly 3C vs Marcinkiewicz 2S
- Kelly 3C vs Marcinkiewicz 10
- Kelly 7C vs Marcinkiewicz 5*W (Endorsee)
- Kelly 7C vs Marcinkiewicz 1 1/4C (Endorsee)
- Kelly 7C vs Marcinkiewicz 2S
- Kelly 7C vs Marcinkiewicz 10
- Kelly 7C-UK vs Marcinkiewicz 5*W (Endorsee)
- Kelly 7C-UK vs Marcinkiewicz 1 1/4C (Endorsee)
- Kelly 7C-UK vs Marcinkiewicz 2S
- Kelly 7C-UK vs Marcinkiewicz 10
All models
Kelly (9)
3C
17.02mm · V.Deep · General
7C
16.51mm · Medium · General
7C-UK
16.51mm · Medium · General
5C
16.76mm · V.Deep · General
4B-UK
16.51mm · — · Orchestral
6V-UK
16.00mm · — · Dark/Deep
6V
16.00mm · — · Dark/Deep
SCREAMER
16.00mm · Shallow · Lead
SCREAMER-UK
16.00mm · Shallow · Lead
Marcinkiewicz (71)
5*W (Endorsee)
16.76mm · V.Shallow
1 1/4C (Endorsee)
17.45mm · Deep
2S
17.27mm · Shallow
10
16.84mm · Deep
5*W (Standard)
16.76mm · V.Shallow
7
16.84mm · Deep
8
16.84mm · Deep
1 / 5B
17.35mm · Medium
1 1/4C (Standard)
17.45mm · Deep
5
16.84mm · Deep
6C (Standard)
16.87mm · Deep
7S
16.84mm · Deep
9
16.84mm · Deep
CH E3.1JWM
17.12mm · Deep
E8.7M. Gillette (Endorsee)
16.33mm · V.Deep
315
17.20mm · V.Deep
4 / 7C
17.20mm · Deep
5XW (Standard)
17.27mm · V.Shallow
6 / 10.5C
16.84mm · Deep
6C (Endorsee)
16.87mm · Deep
Frequently asked questions
Which brand makes better cornet mouthpieces — Kelly or Marcinkiewicz?
Neither brand is universally better. Kelly has 9 models and Marcinkiewicz has 71. The best choice depends on your playing style, preferred cup depth, and tonal goals. Compare specific models head-to-head to find the right fit.
How do Kelly and Marcinkiewicz cornet mouthpieces compare in size?
Kelly averages 16.37mm cup diameter with 3.87mm throat. Marcinkiewicz averages 17.00mm cup diameter with 4.26mm throat.