The Riley Blake Trim It Square Ruler 10.5 is a must-have tool for quilting and crafting enthusiasts. Designed by Lori Holt of Bee in my Bonnet, this non-slip ruler is perfect for trimming blocks, applique, or embroidery projects. The ruler features diagonal lines for easy block centering and colored seam allowance marks for precise trimming. With aqua and denim markings and 1-inch grids marked in 1/8-inch and 1/4-inch increments, this 10.5x10.5 inch ruler is essential for enhancing your craft projects.