We came across a handy PDF called the “iPhone 6 Pre-Order picker”, posted up by an AppleInsider reader, which lets you print out a life-size iPhone 6 and iPhone 6 Plus to assist you in your decision on what device to get.
While the printable PDF doesn’t illustrate the thickness of the devices, they are thinner than any other iPhone at 6.9mm and 7.1mm for the 6 and 6 Plus respectively.
How to print your life-size iPhone 6
You can grab the PDF from here.
Note: Be sure to print the PDF at 100% size, with no automatic scaling in order to get the most accurate life-size dimensions.