Most of the PCI or PCI Express Dialogic cards that we sell fit are one of these 2 sizes, either short or long cards. The older ISA cards vary some from this but they all fit into these 2 same basic sizes, short cards that are 7″ long and long cards that are 13-1/2″. The ISA cards however do not have the removable bracket.
The short cards should fit in most mini and mid tower type cases and even some desktop style cases. The longer cards can fit in mini and mid tower cases if the case doesn’t have drive cages that block off part of the inside space where the cards would fit. In our experience, almost all of the mini and mid-tower cases available today will not hold the long cards. We sell Computer Systems that will hold multiple full length cards, you can see more about our Computer Systems here.