The express tools breakline symbol comes in small too, FYI.

Meredith,

If an ACAD command is also coming in tiny, it might be that your set drawing units don't match the units that the objects were drawn at. Also your Land F/X plot scale for the detail could be off.

Also, you could have annotative scaling turned on, and the annotative scale not set up correctly.

Here's some documentation to help troubleshoot unit and scale issues:

Correcting Units and Scale

Beyond that, you can send in the drawing in a ticket if you still have trouble after going through all those solutions.

How to Submit a Technical Support Ticket

-Amanda

So I got it to work by placing a detail template on the paperspace.  That set the right scale to get the callout to come in at the right size.