This thing is a beast. I got the x large,as many of these items are smaller than described. Well,this one is as big as it says. Due to the spherical shape of the knobs,extraction is more challenging than with a more forgiving taper. I continue to have some anxious moments getting it out of me. Unless you are a genuinely big guy,stay with the smaller sizes. All said,it's a great piece for the experienced sounder to have in his collection.