Which has a bigger cup — Giardinelli 10FL or Giardinelli 12FL?

The Giardinelli 10FL has a cup diameter of 16.00 mm / 0.6299 in compared to 15.50 mm / 0.6102 in on the Giardinelli 12FL — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Giardinelli 10FL vs Giardinelli 12FL

Name: Giardinelli 12FL
Brand: Giardinelli

The Giardinelli 10FL has a wider cup diameter.

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

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Giardinelli 10FL

• Flugelhorn

Cup depthVery deep

Mouthpiece B

Giardinelli 12FL

• Flugelhorn

Cup depthVery deep

Cup Depth

Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.

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.