How big is six inches?

Here is a helpful note for anyone who likes to eat at Subway:

When ordering, don't say “I would like a six foot chicken fillet sub” when you really mean six inch, because the not-so-sparky person behind the counter might just take you seriously and get out six foot-long rolls, at which point you will have a very confusing conversation about how big 6 inches is. Not exactly the usual situation in which you would expect to debate the real size of six inches...

Also, my cookie tastes kind of funny, but i'm going to eat it anyway because I love cookies and can't stop. So if I never blog again, you will know to blame my love of baked goods and someone can mention it in my Eulogy or something.