http://webperso.easynet.fr/~philimar/graphpapeng.htm This site supplies you with a program that lets you create graph paper however it only works for a high resolution screen setting. It is not too helpful if your screen’s resolution is too low. http://www.mathematicshelpcentral.com/graph_paper.htm I recommend this site as the best. I don't think it has anything in the range of mm I think it is in inches but it does have cm squares and some others too. http://www.winsite.com/bin/Info?500000008486 This is another graph-printing program. I didn't have time to check it out extensively. Let me know if you have success with it. http://sorrel.humboldt.edu/~geodept/geology531/graph_paper_index.html This one I recommend for high school students as it contains VERY advanced graphs for things like measuring rainfall and other phenomenon. It is the least intimidating of all of them. Enter at your own risk. http://id.mind.net/~zona/ezGraph/ezGraph.html This site is just beautiful you can't print the graphs you make but... http://www.teachervision.com/lesson-plans/lesson-6170.html Ahhh! Finally a metric system site this has cm squares!