Go to your layout and enter layout mode.
In print setup, select both the dymo printer and the custom page size for that printer.
You should now see dark vertical and horizontal lines on your layout. The rectangle they form is the printable area of one label. anything to the right of the vertical line will not print. Anything below the horizontal line won't print on the first label (page) of your out put.
Size the layout and position your fields to fit inside the rectangle formed by these two lines.
Thanks for the help!! That seems to have done it. Woo hoo!