Thank you to anyone who can help me with this.
I've designed a standard 8.5" x 11" (actually 10.98" per printer's specs) letterhead in InDesign.
When I export to PDF, Bridge shows the dimensions of the document to be 648x827, which leads me to think the file is exporting at 72ppi.
The printer's specs indicate file size should be 2551 x 3295.
I feel like I'm missing something basic but have had no luck searching on here and other places online.
Any help/advice would be most appreciated.