i aint measured the pin but i have a 60" cue and it fits in my action elite 3x5 hard soft case. I also bought a 4x6 off ebay (i think it was carl's cues store) and i had a steve klein 30 inch butt with this monster 3/8 11 pin that was like 3 inches long, and it would fit in that. If you shop ebay at all and look in some of the ebay "stores" you can email the guys and ask them what size butt/shaft it will hold and theyll tell ya.
Jim Murnak makes the best cases, bar none. jimmurnakcuecases.com.
800-443-3478. And I have Instrokes, several Whittens and others. You can order the case the size you need. My case is GL2113 and as much as I like Jacks cases, and Jack and his wife, its better, but about the same price.