Made in the USA with high quality acrylic and precision measurements ensuring accuracy for your quilting, sewing, patchwork, and crafting projects. Creative Grids exclusive non-slip grip allows you to easily slide the ruler over the fabric until positioned correctly. Then, when slight pressure is applied, the grip holds the ruler in place, eliminating slipping while you cut. Easy to read 1in black grid lines with 1/8in and 1/4in marks. Solids black lines are marked at 7/8in intervals taking the math out of figuring what size square to start with. Half-square triangle blocks finished sizes range from 1in to 5in. Comes with fully illustrated step by step instructions. Scan the QR Code printed right on the ruler to view a how-to video on how to use this ruler. Total Size – 5-7/8in x 11-7/8in Take the math out of cutting half-square triangles with this ruler designed by Rachel Cross for Creative Grids by adding 7/8in to the finished size.