As a bass trombonist, I am used to playing on a 1 & 1/4th G mouthpiece. Recently, however, I acquired a brand-new instrument, which came with a completely unmarked mouthpiece. The mouthpiece looks pretty similar to the one I use with my other instrument, but there are some slight differences in rim & cup size.
1. What does "1 & 1/4 G" mean exactly?
2. Is there any way I could measure my new mouthpiece to determine its size? (using a ruler, tape measure, piece of string, or any other household items)
I forgot to mention: the new instrument is an inexpensive Mack model.