I was asked again today, at work, how to cut a piece that is larger than any of your rulers. So, here are a couple of pictures to show you how I do it. I use a combination of rulers whichever ones make it easiest to measure the size and cut across the whole piece at once. The pictures this time are from cutting the pieces you need to make the faux leather journal covers (see post below).
Now to cut the length of 16". This time I chose to use the yellow ruler as my main ruler. It's a 6" width so now I need to measure 10" with the white ruler to get a total of 16". In order to make sure my piece is square set the 1" line on the yellow ruler and the 10" line on the white ruler on the edges I've already cut. They should line up perfectly. If not, one of those edges needs to be corrected; in this case I'd re-trim the end.