These hour-glass blocks were cut freehand, and then machine stitched with a quarter inch seam. The original squares which I cut into quarters were 2.5", 3.5" and 5.5". I didn't plan them that way, that's just how they came out of my green scrap bag. At the moment they aren't much, but I'm planning on making many more in these sizes, and making them fit!
As far as the colour goes at the moment I plan to stay with greens, and add blue, aqua and yellow in limited amounts, taking my cue from the small block lower left.. Of course this will probably change! It's improv after all!
Happy sewing
Marly.