Grid Glider creates a slick sewing surface. Polyester mat with micro suction technology secures to Table and sewing machine. Now Available in 2 sizes. 12" x 20" (Teal) or 11″ x 14″ (Salmon) removable polyester, hole pre-cut for feed dogs Incudes a 1/4″, 1/2″ and 5/8″ seam allowances, a Centering Ruler and Grid with 1″ spacing across entire mat. Slick topside allows for easy fabric glide Micro-suction technology secures to sewing machine and/or extension table Can be trimmed down with scissors Clean with warm water and air dry to revive Ideal for Free Motion Quilting