This Chips Ahoy twin sheet set is brand new in the package, vintage from 2001.  It's never been opened.  Inside the package is:

flat sheet: 66x96in

fitted sheet: fits 39 by 76 mattress

standard pillowcase: fits 20x26in pillow

Please see photos.

Please see my other auctions for tons of other stuff as well.  Thanks for looking - have a great day!