Maybe I should be practical - I have a nice Queen Size Heirloom 80/20 batt 108 x 90 I should make a top that size since.
I suppose I should make it an inch or two smaller than the batt? Maybe 106 x 88? or can I go the whole batt size with backing a couple of inches larger?
I'll check your instructions again. Thanks so much for the offer. The Jelly roll strips are 2 1/2" x 44 - 45.