In article , Mike Coslo
writes:

Ever need one piece of graph paper at 10:00 at night?

Here is a link to a handy website with pdf's of various types of graph
paper.

http://www.mathematicshelpcentral.com/graph_paper.htm

Thanks, Mike. The linked program for generating your own graph
paper is also handy.

If one has a good scanner, it should be able to repro exact
dimensions...such as copying the (copyrighted) commercial
graph papers (such as 3-, 4-, 5-log types or Smith charts)
which are "non-standard" for anyone not in electronics. :-)

I use a combination of PDFs, BMPs (via MS Paint) to get 1:1
drill guides for PCBs and small chassis structures. With either
Corel or Adobe photo edit programs you will find that one can
do quite-exact photo reductions of 2:1 or even 3:1 by the
adjustment of pixels per inch in either Corel Photo House or
Adobe PhotoDeluxe 3. Other photo programs should be able to
do the same thing. Good for one-of-a-kind projects.

I've regularly done 2:1 scale manual PCB resist traces on a pad
of vellum (gridded 0.1"), scanned that into BMP format, cleaned
it up in MS Paint (image attributes set to B&W), dropped the
scale to 1:1, and done the etch masks on VueGraph transparent
stock. Note: Paint allows adding lettering, numbers, etc. as you
need. All without going out to any photo services. Again, good
for quick one-of-a-kind projects.