I have the 20 two-and-a-half inch hourglass blocks made.
The pattern calls for a different method of construction for the hourglass units, but I like to oversize and cut down since that helps me keep the units more accurate. I knew there was a formula for oversizing, and I found a chart at Vicki'sFabricCreations blogspot that gives cutting measurements for several finished hourglass block sizes. It's printer friendly, so I printed it out for future referral. :-) She also has a tutorial on a couple of methods for making the hourglass blocks. I like to use the second method that she shows because it gives two blocks at a time. Two birds with one stone.
Thought I'd share a tip with you today that I discovered as I was doing some hand stitching recently and needed to mark the diagonal. There was a tissue box nearby, I grabbed one, and found that using a tissue to lay the fabric on as I marked helped to keep the fabric from slipping. Using a tissue is easier on my fingers than using sandpaper to lay the fabric on, and it's just as effective. Handier at times, too!
I hope to post a picture of my finished wall/table quilt soon. I'm getting so behind in my homework!