Oh good, I will use this block in a baby quilt I am making but will find much more exciting and colorful fabric for it.
This block finishes at 8 1/4, so it's a perfect 8 inch block.
You can control the size by making your own templates. Just take a square, 1/4 of the size of the block you are making, use a compass to draw the convex, cut apart and add the 1/4 inch seams.