Quilting Dictionary Nesting SeamsPiecingShare this Facebook Pinterest X WhatsApp Email Copy linkPressing opposing seam allowances in opposite directions so they interlock and lie flat where two seams meet. Scant 1/4" Seam Nesting Seams Y-Seam / Set-in Chain Piecing Nesting Seams Cross-Section Pressing seam allowances in opposite directions creates interlocking fabric folds that align points perfectly without bulk. Seam Pressed LeftSeam Pressed Right Interlocked / Nested Point Also see Seam Allowance