The easiest way I can think of is to create an empty chord box in something like Paint Shop pro or similar (even Paint) with enough frets to fit your hand (5?)

Open a Word document and insert it as a picture.
Make it the size you want so that you can read it and use it.
Copy it (say) 8 times across the page
Leave a line or two for words etc
Copy it (say) 8 times across the page

Continue to end of page.

Print or photocopy as many as you like and use a biro and put fret number next to box. You can carry it anywhere. It would fit any song - if it has loads of chords and changes you spread the words out - if there are few leave the chord boxes empty.

Nice low tech solution and you can use it anywhere!

I've uploaded I made quickly here which you can get the idea from or use if you have Word and it works for you.

All the best