Don't know if a tumbler chart exists. If not, you could measure the bottom
and top part of the template excluding seam allowance and add them together.
Then divide the width of your quilt by that amount. That should give you the
number of pairs you would have to make for the width. Take that number and
multiply by two for the final width no.
For the height, measure the height of the template excluding the seam allowance.
Take the length of your quilt and divide by the height of the template and you
should have the number.
Now you can multiply the width no. by height no. and you should have a good
estimate of how many tumbler blocks you will need.
You might want to put it on graph paper.
Clear as mud?
