Despite the initial geometry used in development, the Modern Spiral Tree Skirt (SEW-104) was the most fun of any pattern I’ve written, and it came together in record time thanks to the mathematical assistance of my college age son. We collaborated on the trigonometry via text during his freshman year at RIT.

I was determined to design a wedged tree skirt that tessellated easily into a circle, yet didn’t waste lots of fabric. I also was hoping to utilize fat quarters since I had a stack of Christmas holiday fat quarters on hand.

For about a week my ...

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