The Quick Trim & Circle Ruler is available in two sizes, 3 1/2" by 12 1/2" and 4 1/2" by 24 1/2". Both rulers include the Turn Around feature as well as all of the markings of a traditional Creative Grids ruler. 45 degree angle lines that cross at the 1/4" line and are printed in white, have been added to each side of the ruler. These lines will allow you to pre-trim any 45 degree angle cut in any book or pattern, leaving the 1/4" seam allowance intact. These lines will also allow you to join binding and border strips perfectly. The holes drilled in the center of the ruler will allow you to draw circles up to 22" using the smaller ruler and up to 46" using the larger ruler.