There's not a single y-seam to be found here - and it's a whole lot easier to make than it might appear. Trust me! (It always worried my Mom when she'd hear me say that.) It's just cut... sew... press. Cut some more... sort triangles into stars... lay it all out... sew some more... press some more... really. It's that simple. Just the usual process. Finished size 35in x 40in.