The crate size (measurements) is very important for your pets safety and comfort. Use the diagram and directions to assist in your crate size selection.
Length:  Measure from the breast bone to the base of the tail plus 2" for medium dogs and 6" for large dogs.

Height:  Measure from the floor to the dogs shoulder plus 3"-6". 

The dog should be able to stand, turn around, and lie down comfortably.