Which has a bigger cup — Marcinkiewicz 304 or Marcinkiewicz 3 / 5C?

Both mouthpieces have virtually identical cup diameters at 17.20 mm / 0.6772 in.

How does cup depth compare between Marcinkiewicz 304 and Marcinkiewicz 3 / 5C?

The Marcinkiewicz 3 / 5C has a medium cup while the Marcinkiewicz 304 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Marcinkiewicz 304 vs Marcinkiewicz 3 / 5C

Name: Marcinkiewicz 3 / 5C
Brand: Marcinkiewicz

the Marcinkiewicz 3 / 5C features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Marcinkiewicz 304

• Cornet

Backbore—

Mouthpiece B

Marcinkiewicz 3 / 5C

• Cornet

Backbore—

Which is better?

Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.