Nine Patch Uneven Nine Patch
The Uneven Nine Patch style of quilt block is so named because not all of the nine individual patches are the same size as is the case in a regular nine patch quilt block. This style of quilt block is often used in 10" quilt block to make the math easier, but you will find this construction method in many other quilt blocks as well.

Back and Forth

Free Quilt Block Pattern

The Back and Forth quilt block -- although technically a five patch (as it is designed using a 5 x 5 grid) -- is constructed as an uneven nine patch block since the three rows of three patches each are not all the same size.

This quilt block is an easy block to build your skill set.