To make a 6" finished pinwheel block, you need to make 4- 3 1/2" unfinished HSTs (3" finished) and sew those together. There are 101 ways to make HSTs, anyone of these methods will work for you. What method is comfortable for you?

The only way I know to strip piece HSTs is to cut your strips on the bias. I saw this done once on a Fons and Porter episode. I know I have some books that explain this method. I think Marsha McCloskey uses this method a lot.

I did a quick google search and found this blog. The lady here is making 2 1/2" (2" finished HSTs). You need to cut your strips at 3 1/2". Do a practice try before you cut and sew all your fabric first (been there, done that).

http://loisarnold.blogspot.ca/2012/0...rial-bias.html