Bach 3C vs Stork CM3
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Bach 3C
• Trumpet
Cup diameter16.30 mm / 0.6417 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Stork CM3
Silver plate · Trumpet
ClassicalCup diameter16.30 mm / 0.6417 in
Cup depthMedium
Rim width6.75 mm / 0.2657 in
Throat diameter3.66 mm / 0.1441 in
Backbore—
FinishSilver plate
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.30 mm / 0.6417 in.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
Finish
The Bach 3C is listed as unspecified, and the Stork CM3 as Silver plate. Finish mainly changes lip feel, tarnish resistance, and appearance rather than cup geometry.
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.