Yardage for BONUS blocks?

Tricky ... I have not given specific yardage instructions for the BONUS blocks. It will depend how you use them!

Many quilters have chosen to extend the size of their quilts with the BONUS blocks, or make additional quilts. Here's Marisa Provenzali's 2020 quilt made of BONUS blocks:

Here's Charlott Sundahl's 2017 quilt made for her son with extra blocks. She added an innovative border.

Lynn Middleton added BONUS blocks to her make her quilt larger:

In 2017, Paul Rickman made gorgeous twin quilts:

Feel free to swap out blocks from the main quilt with the more complicated BONUS blocks. I haven't seen anyone make a double-sided quilt yet, but that is an option.

You are only limited by your imagination!