Saturday, May 12, 2012

How to change the size of a block

Recently I have received many questions about how to change the size of a block. One quilter asked me to enlarge the block and send it back to her, but
Adobe Acrobat allows you to print at different percentages yourself.  
If you want to reduce the size, it's easy to do. If you need to enlarge the block, it's a little harder because the block is arranged on four sheets and you have to cut them out and stick them together. One easy way to change the size is to print the block and photocopy at whatever percentage you want.

Beth from PieceByNumbers gives a very convenient table for enlarging or reducing a 6" block pattern. If the original block is 4", use the following table to change the pattern to your desired block size

If you need other sizes, you can calculate with the following formula. I have  written examples. The formula helps you no matter what size the original block is.

Is the block square? Never mind. Measure one of the sides and calculate the percentage for copying.
It doesn't matter which one.

If you still have questions, don't hesitate to contact me.


  1. 6" square makes a 12" block so this size is quite popular. I wanted that block from just the center, so that it makes a large star and cross. To get this, enlarge only the center by 242%. You might consider that size for this pattern. Thank you!

    1. I don't understand which pattern do you mean.
      Sometimes we need orphan blocks for potholders, coasters, bags and place mats, so calculating different sizes is helpful.