What mouthpieces should an 11 year old try?

[kehaulani]

Bach 7c, Yamahas and Schilkes.

FWIW - as a school kid, I initially played a Bach 7C which didn't bother me because I thought "a mouthpiece is a mouthpiece". I switched to a Schilke H (Herseth, erstwhile Schilke 11) and all was well. Played it in many styles of music from secondary school into college. The Yamahas are based on Schilkes.

The go-to mouthpiece in my area (Austin) is Bach 3C (which I don't necessarily agree with) but it can't be denied that Texas is historically a powerhouse for developing trumpeters. Bach 7C and 3C, Schilke/Yamaha 11 are all larger than a Bach 10 1/2 C, so . . .

And BTW, I think the OP is overmanaging/thinking this. This is an underdeveloped trumpet kid we're talking ab out. He shouldn't harm himself but doesn't need much more than a MOR trumpet mouthpiece from a reputable manufacturer, like a Yamaha 11B4. Hit the Shed and fuggedaboutit.
_________________
"If you don't live it, it won't come out of your horn." Bird
"Well, even if I could play like Wynton, I wouldn't play like Wynton." Chet Baker

Adams A-9 Trumpet
Benge 3X Cornet
Getzen Capri Cornet (for sale).

[Jaw04]

My controversial opinion is that mouthpiece size selection does not have a relationship with the size or shape of a students lips or mouth. I don't agree that "bigger lips" or "fleshier lips" should require bigger mouthpieces or vice versa.

Children can play trombone, french horn, tuba, trumpet, whatever. People with small lips can play the tuba. People with big lips can play the trumpet. I believe selecting a mouthpiece is a personal choice and has more to do with the sound you want, the technique you use to play, and the style of music you play than it does have to do anatomy.

I think a child should start on a normal mouthpiece and there is no such thing as a beginner mouthpiece. A 3C would be fine. I personally like it better than the 7C, but I don't think it matters that much.

[Doug Elliott]

Not controversial to me, I agree.

[Druyff]

I vote for a Bach 10.5C
Easier to play and a better match to a small mouth than a 7C.
_________________
80ties Holton T101 Symphony (Silverplate)
Bach Corp 10-1/2C

[jondrowjf@gmail.com]

I agree with the recommendation of a 10.5 trumpet mouthpiece.
_________________
Jupiter 520 M lacquered Shepherds crook cornet
Blessing XL lacquered Shepherds crook cornet
Denis Wick 4 W gold & Denis Wick 4B classic mp
Jupiter 9e silverplated short shank mouthpiece
Bach Megatone 5B mouthpiece