When you do your designs or wireframes, do you sketch them out first on either graph or dotted paper? You can now print your own paper using PaperKit.
With PaperKit you can adjust and customise the various margins, stroke colour and width, grid line spacing and width of the page to suite your needs.
Once you are happy with the customisation of the grid, you can download a PDF to print as many times as you like.
You can even create custom lined/ruled paper to your needs.