Giardinelli 12M vs Giardinelli 17C
The Giardinelli 12M has a wider cup diameter, the Giardinelli 17C features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Giardinelli 12M
• Cornet
Cup diameter15.50 mm / 0.6102 in
vs
Mouthpiece B
Giardinelli 17C
• Cornet
Cup diameter15.00 mm / 0.5906 in
Cup Diameter
The Giardinelli 12M has a cup diameter of 15.50 mm / 0.6102 in compared to 15.00 mm / 0.5906 in on the Giardinelli 17C — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.