Math question for the numerically challenged (attic window)
 

I'm making an attic window quilt using 16x12 blocks. I'm going to make the attic window part 3.5 inches. I want to do the HST in the corner so I don't have to miter. How much larger do I make the squares to sew to make the HST so the HST comes out to 3.5 inch? Thanks for your help - numbers are NOT my forte!:o

Cut the plain squares to 4.5".
Sew to make your HSTs.
Trim to 3.5"

Jan in VA

I believe the general rule is add 7/8" to your finished size and that is your cutting size. I usually just add an inch - in this case would cut 4.5" and then trim down to the 3.5". Someone else might come along and be better at the math.

Thank you for your help, I really appreciate it!