Problem: "I cannot find the labels defined that I need using Crystal Reports."
You will have to define the labels as "user defined". It's not that difficult, and the most label packages give the stats for everything necessary (Page Margins Label Size, and Gap Between Labels).
If you are using a dot matrix printer and need continual feed labels, you will need to see the FAQ that discusses special form sizes ...
In addition, if you are brave, you can enter this information into the file "LABELS.TXT" in the Crystal folder under \VISUALDB. You will have to line things up correctly, but once the label definition is stored there, the next time you want to use that label size, you can simply select it ...