It's a breeze to get your graphics perfectly aligned every time with the T-Shirt Transformation Ruler Center. Use centering marks on the ruler to make t-shirt blocks for quilts, pillows, and tote bags. • Center, mark, and cut perfect t-shirt blocks for quilts, pillows, and tote bags. Size: 15-1/2” x 15-1/2” grid Key Features: Perfectly align t-shirt graphics using centering marks on the ruler Three guide sizes to accommodate a wide variety of t-shirt sizes and graphics Use any combination of 10", 12" and 15" (finished dimension) for square or rectangle blocks Use to center a t-shirt block on point Combine t-shirt blocks with your favorite quilt blocks and borders for a one-of-a-kind treasured keepsake. Instructions included.