Gridded boards with 10 or 15mm squares?

[Kikuchiyo]

Just looking at terrain boards for my 6mm game plans and would ideally like a couple of small boards (A4 paper size) for outside locations, before I hand make something I was wondering if there is anything I can print

[Daeothar]

I've  printed off a few of these for my own RPG games, but I went for a size where the grid was 1 inch. Easy enough to resize to the format you require though.

Some are pretty large, but they're quite beautifully drawn and I'm sure there are some you can use

RPG map repository

[Dubar]

Try here:

https://justfamilyfun.com/printable-squared-paper-templates/