Guitar slides in S, L, M and XL sizes that are more or less what you would encounter in a music store.
Inner diameters and lengths:
Size S - 17mm inner diameter, 55mm long
Size L - 19mm diameter, 59mm long
Size M - 21mm diameter, 64mm long
Size XL - 23mm diameter, 72mm long
All sizes are 1.5mm thick, which should make them rigid enough to sound good.
Print vertically. I'd suggest using a brim for stability, but removing it may be annoying. YMMV.
The author marked this model as their own original creation.