Check the listing for details. Triangles On A Roll 1-1/2" Finished Block Half-Square Triangles Fits 10" Squares. Condition: New. Listed at 10.74 USD. Triangles On A Roll 1-1/2" Finished Block Half-Square Triangles Fits 10" Squares. Triangles on a Roll - 1 -1/2 inch Finished Half Square 50 Ft Roll - Makes 1050 Triangles on a Roll 1-1/2in Half Square 50ft Roll Use this size to make 1-1/2in finished size half square triangles. The seam allowances are included in the pattern, so all you need to do is sew and cut using the pattern on the paper. Instructions are provided on the paper. Each roll makes 1050 half square triangles.Everyone loves the quilts using half-square triangles. Triangles on a Roll helps the perfectionist and beginner make perfect half square triangles. By sewing on the dotted lines and cutting on the solid lines it eliminates the need to square up each half square triangle. The technique is called paper piecing.The roll is 50 feet long and makes 1050 1-1/2" finished blocks using 10" squares. There is multiple youtube videos using this product. There is also the Cake Mix Quilt Book that displays several ways of using half square triangles. There is also unlimited quilting patterns using half square triangle. MADE IN THE USA . . .