For large templates, use Adobe Acrobat Reader to Poster Print over multiple smaller pages, and assemble to form the single large template. See Printing Help for instructions

For very large prints, create the template at a smaller scale and scale up with the 'Tile Scale' setting in Adobe Acrobat Reader to print. E.g. for a 5 feet high diagram, create the initial diagram at 1 foot, and enter 500% in 'Tile Scale' (1' x 500% = 5')
See: How to Print Very Large Templates for instructions.

Hit Super Size for extra large characters. Mouse over template image to see printed page paper size. (Hit 'Trim Rulers' first)

To work out horizontal spacing and total length of a word, select a Scale larger than 1:1. The characters will not be to scale, but the measurements are correct for the displayed character height. Adjust character height to desired (displayed) size, enter complete word and drag Spacing slider to see individual character spacings and total length.