Originally Posted by AlwaysQuilting

I know that king size pillowcases are approx. 21x 40 finished

All the tutes I've seen only give measurements for standard pillowcases and they cut the fabric at 27" for a finished 21" x 30"

Can anyone tell me how much fabric I'll need to cut for the large section of a king size pillowcase?
(I know the contrast and cuff measurements will be the same as the standard).

I should be able to figure this out but I only have limited matching fabric left and I can't afford to goof.
Thanks