Have you thought about drawing out the original block you want to upsize on graph paper, then enlarging it on a copier until you get the size you want. Write that number down if you have more blocks you want to upsize. Then use the enlarged pattern as a paper piecing pattern. That way it will be totally accurate and no math involved. "smile" The other alternative is to draw the block in EQ as the size it starts out with and then print rotary cutting directions in the size you want it to be. EQ will also let you make a foundation (paper piecing) pattern that you can use for sewing in the new upsized version. Clear as Mud???

Love the color combo....awesome