Large dimensions: length 27, thickness 17 and height 39(cm).
Trumpet: length 22, back 13.5, height 32(cm)
Boys suggest choosing a large size, while girls look at their personal needs. Small girls can choose small, and big girls can choose large. That depends on how many things are loaded.
My girl, who is about 160 in height, seldom cleans things, so she bought a small bag of Anello, which is just right.