This 8-1/2" square ruler from Creative Grids® is a great size for working on small to medium sized blocks.

• Easy to read black and white markings are printed in 1in grids marked in 1/8" and 1/4" increments.
  
• Use the black numbers printed on white dots and the 1/4" grip sides to cut whole inches.
  
• Use the Turn-a-Round feature to cut 1/2" increments by following the white numbers on black dots and 1/2" grip sides.
  
• The 1/4" dashed lines that are printed on two adjoining sides, aid in trimming seam allowances.
  
• White horizontal and vertical lines are printed on the square to show the center of the ruler. Use these lines to square up blocks based on four-patches, embroidered, and appliques blocks.
  
• A 45 degree diagonal line makes trimming half-square triangle blocks easy and accurate.
  
• The ruler slides easily over the fabric until pressure is applied. Then our exclusive grip holds the fabric in place while cutting, eliminating slipping and miss-cuts.
  
• Scan the QR Code to view a tutorial video on these features and to see the patterns that can be made with this ruler.
  

From Creative Grids USA