I wasn't going to make this block because of the small pieces of a 6" block but then I saw this quilt by Bonnie Hunter (below) saying she made 6" blocks! But after reviewing how she made her quilt, it's actually a 12" block when made the way Nancy Cabot shows! Bonnie's half square triangle units finish at 1 1/2" and Nancy's at 3/4"!
You can follow Bonnie Hunter's tutorial by clicking here if you want to see how to make this quilt.
The Ocean Wave block can be found in BlockBase as #2628 just as Nancy Cabot drew it. I'm not crazy about how that block goes together so I redrew it so I could make four identical pieces as shown which makes more sense to me and is easier.
I paper pieced this unit because I find it to be easier when working with tiny pieces.
Each of these four units has four paper pieced sections like this-
You can download the paper piecing templates here.
This block can be made from 3/4" finished size half square triangles using your favorite method to make those units and adding single triangles made by cutting a 1 5/8" square diagonally to get two of the single triangles. The large background triangles are cut by cutting a 2 3/8" square diagonally. That's too much cutting for me when I can just paper piece!
There is a tutorial here for a 16" block that might be helpful if you are having a hard time understanding what I am trying to say about the single and background triangles or if you want to make a larger block.