Originally Posted by LyndaOH
I agree with MTS, but if you're not in a rush you should try and figure out why it's not coming out 12 1/2".
Start with the cutting and make sure you are getting accurate strip widths. One famous quilter (I think it's Jinny Beyer) suggests always cutting one thread larger than the measurement.
Have you checked to see if your 1/4" seam is actually a true 1/4"? Your foot or needle may need to be adjusted to get the accuracy you need.
What size is your block coming out? Is it 12 1/2" in any direction?
Hope this helps!
I use this same cutting technique. If you have Omni ruler, don't line up the cut edge of the fabric on the tiny black line. Move it to the outside yellow line (located on both sides of the tiny black line). NOBODY tells you that you lose a little bit of fabric when pressing a seam to the side. That is why there is so much talk about a scant 1/4' seam. My friend showed me this trick (I wish I could show you) and it resolved my shortage. By lining it up to the yellow line instead, you are just cutting your strips just a thickness of a pin. But you have to find out how accurate your seams are too. Many ways to correct that problem. I always find that being consistence is best. You can always add a bit more fabric in your borders to make up for any slight lost on the size of your quilt. It is so IMPORTANT to get joy out of what you have made !! GOOD LUCK !! :mrgreen: