Good point LindaOH!

And it would be a rectangle, not a square. So it would measure 9.5" x 19.5". In order to get a 12.5" square nine patch, each square would have to be 4.5". You cannot get nine 4.5" squares from a rectangle of that size, you can only get eight.

I was getting not so great blocks and then decided to trim the HST to 6 inches. That really helped. The finished block was a little wonky and around 10 1/4. I trimmed them to 10 inches and they look great. I lost a little bit of the small corner triangles but now have nice even sized blocks.

I think on this subject we must remember that Jenny is doing a take-off of a traditional block using a precut. It would be much easier to start, in this case, with a square that is divisible evenly by 3 and add 1/2" for seam allowances. But because a layer cake is 10" those cut pieces and her final block are going to be oddly fractioned measurements, and sometimes biases where we normally would not put a bias, she is just showing her version....to fit into her precut fabric market. I think what she is trying to get across is - here's a quicker way to get a quilt done, using the precuts and a different way of cutting some of those shapes.......

I have read some cutting directions in mags that call for what I think of as odd fractions....like, ---3/8.....if I do one like that I will revamp the whole block if I can, or just pass on it...I hate those "off fractions". JMHO

I love this block. Here's a photo of the top I've been working (sorry, the lighting's not very good) on by following Jenny's video. I used two Moda Joy Batik layer cakes to get enough of the light color. I'm still deciding on exactly how I want to do the border, but so far I'm pretty pleased with the way it's coming out. There are a few areas with bias issues but I think I can get everything to come out fine when I quilt it. I used a TON of starch. My finished blocks are 11 1/2 inches.

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If it were mine I would put a border on just to keep those bias edges from waving when you bind it..JMHO. What color border? Maybe a modern print w/your primary colors in it.........

I was going to do a ten inch piano key border to use up the leftover red and green layer cake fabric. That turned out to be completely overwhelming. I think I may go with a 2 1/2 inch light strip, 5 inch piano key, another 2 1/2 inch strip and the other 5 inch piano key border. I had to order more light batik fabric (I'll use it for the backing too) so am waiting for it to show up. I do like the idea of going with a completely different red and green print though. If I end up not liking the piano keys I may go with that. Thanks!

Beautiful Deb! I will eventually get around to making this quilt...its in my bucket list with about 20 others :)

My disappearing hour glass block turned out to be 12.75" so I cut 2.125" on either side of the center seam. They turned out perfect. I am almost finished with the top. Will post a picture when finished.

I cut mine 2", didn't even measure the size of the block. It worked fine for me.