Creative Grids 12-1/2in Square It Up or Fussy Cut Square Quilting Ruler – CGRSQ12 – Made in USA, Non-Slip Grip Acrylic Quilting, Sewing, Crafting, Patchwork Ruler & Template

The 12-1/2in Square It Up or Fussy Cut Square, designed by Penny Haren for Creative Grids, has horizontal, vertical, and diagonal markings to make squaring up your blocks up to 12-1/2in squares a breeze.