Which has a bigger cup — Bob Reeves 43/F or Schilke 20F?

The Schilke 20F has a cup diameter of 17.78 mm / 0.7000 in compared to 17.07 mm / 0.6720 in on the Bob Reeves 43/F — a difference of 0.71 mm / 0.0280 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 43/F and Schilke 20F?

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

Bob Reeves 43/F vs Schilke 20F

Name: Schilke 20F
Brand: Schilke

The Schilke 20F 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 43/F

• Flugelhorn

Rim width—

Mouthpiece B

Schilke 20F

• Flugelhorn

Rim width—

Best suited for

📣High-volume projection — open throat for power

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.