Twister Quilt Twin size Twister Ruler quilt. I think I have the math down for a twister quilt... With 10" blocks and a 6" border the quilt ends up 77% smaller than the starting size. So this quilt started out 7x10 - 10" blocks plus a 6" border all the way around. So it was 77.5" x 106" before using the twister ruler. Finished size before borders is now 60" x 82" which is .77 times original size. Hope that helps if you are trying to make a certain size twister quilt.