The free 1:1 scale .pdf can be printed using “poster” mode on most printers and used to create your own template similar to the one I used to make the growth charts shown in Making Growth Charts. If you would rather purchase a ready to use template just select your preferred option from the drop down menu. Templates are laser cut from 0.22″ clear cast acrylic and include a pre-installed waste board for alignment and to help prevent tear out at the edge of your growth chart by supporting the cut surface. The Deluxe Chart Template also includes a rear alignment bar for ease of use as well as slots for adding mounting holes with a key-hole bit. Number insert templates can be added on with the Deluxe Chart Template.
Here is a link to the router bit that I use as well as a bushing kit that you may find useful: