Euphonium.

Rim inside diameter (mm)26.726.426.225.925.7525.525.4
3D3.5D4D4.5D5D5.5D6D
Bach2G3G4G
4GB
5G
5GL
5GB
6½AL
6½AM
6½A
Schilke5352E252
52D
51
51C4
51D
50
50C4
Alliance2A
Presitge 2
3A
Presitge 3
4A
Presitge 4
Denis WickSM3
SM3U
SM3X
SM3.5
SM4
SM4U
SM4X
SM5
SM5U
SM6
SM6U
Hammond10111213
Doug Elliot105104103102101100
Kelly5G51D
Warburton3G4GDL
4GD
4G
5GDL
5GD
5G
Yamaha55545352
PerantucciPT-7C
PT-5C
PT-4C
JK4A
4B
4C
5A
5B
5C
6A
6B
6C
7A
7B
7C