I saw an article recently that a Chabad sofer in Israel has recently broken the world record for the largest mezuzah (50+ inches tall). See article here http://www.crownheights.info/index.php?itemid=43784&pending=1#pending.
This comes as the latest of a number of attempts to write the world's biggest mezuzah. A number of years ago another Israeli sofer actually made it into Guiness Book Of World Records for writing what was then the world's largest mezuzah. See link here: http://www.israelnationalnews.com/News/News.aspx/127943
Then there is the huge mezuzah at Ben Gurion Airpot which must be at least one meter tall.
My question is: Are these supersized mezuzos kosher? My concern is that it says in the Torah "Uchsavtem" not "Utziyartem". Stam must be written, not drawn. These jumbo letters cannot be written like normal letters, but rather must be drawn or "painted" (ableit with a quill rather than a paintbrush). Is such a manner of writing considered kesivah?
I would appreciate hearing anyone's opinion on this.