Could of done with this a few months back.
My personal tip for home pattern printing is pay attention to the test square if one exists. Sometimes pattern makers who supply downloadable patterns include a test square like -a 10cm box which says 10cm box for example.
Its a really smart addition to a downloadable pattern (not all patterns have them). You just whip out your ruler and double check the scale . For a doubting Thomas like me ,I find this quite reassuring. It would be such a pity and waste to start cutting a pattern out only to find the scale is incorrect. As my Dad likes to say, Measure twice cut once.
Pattern Runaway who supply the guide are a lovely little business and design some beautiful patterns.