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.

Mrs. Keller's Nine Patch

Free Quilt Block Pattern

Mrs. Keller's Nine Patch is an interesting name for this quilt block because, depending on how you look at it -- (and your colour choices for fabric) -- it contains a nine patch block in the centre (although you will really have to search for it), or the construction (as I have shown you here) is to make this quilt block as an "uneven" nine patch block.

This quilt block could be considered as a five patch as well, because it is made on a 5 x 5 grid. All in all, this is an easy block to construct and you have great fun with your colour choices.