Eight Patch quilt blocks are designed on an 8 x 8 grid, hence the name. Although this grid is the basis of the designs, often larger pieces are used. The math in an eight patch is usually quite easy, as often quilt blocks are made in sizes 8", 12" or 16" measurements.
Eight patch blocks are usually chosen by experienced quilters due to the number of pieces in the block (but don't let that deter you). Sewing a precise quarter inch seam allowance is necessary in order to match one patch to the next patch. More seams means more chance of error, and these small errors add up. But ... I hope this last note does not deter you from trying out some of these amazing quilt blocks.
Free Quilt Block Pattern
The Crow's Feet quilt block is technically an eight patch block, but rarely is sewn together row by row as that just gets cumbersome. Instead it is constructed as an uneven nine patch since that just makes the sewing easier. I have assigned this quilt block to an intermediate level of difficulty, simply due to the number of pieces in the block. None of the patches are difficult to construct. You will be making half square triangles and flying geese units.
The two sample quilts illustrated look very different and that is simply because of the choice of layout of the blocks.