I copied this from my flickr entry.
This square doily is the first doily from "The Filet Crochet Book" by Chris Rankin. Finished UN-blocked and UN-starched size is 11"h x 11.5"w. I used size 10 crochet cotton that was over 20 years old and a size 6 US steel crochet hook. When I made my first one, it came out rectangular using the pattern as written. So I changed the stitch to treble crochet and it came out thus. Pretty, huh? :D
Just wanted to add that the cotton was discolored from age but once washed it came out a beautiful creamy white. I took the photo indoors without flash.