Which has a bigger cup — Bob Reeves 40/C/s or Giardinelli 17C?

The Bob Reeves 40/C/s has a cup diameter of 15.88 mm / 0.6252 in compared to 15.00 mm / 0.5906 in on the Giardinelli 17C — a difference of 0.88 mm / 0.0346 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 40/C/s and Giardinelli 17C?

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

Bob Reeves 40/C/s vs Giardinelli 17C

Name: Giardinelli 17C
Brand: Giardinelli

The Bob Reeves 40/C/s has a wider cup diameter.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bob Reeves 40/C/s

• Cornet

Rim width—

Mouthpiece B

Giardinelli 17C

• Cornet

Rim width—

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.