ARTEZA Acrylic Quilting Rulers & Non Slip Rings, Set of 4 (4.5"x4.5", 6"x6", 9.5"x9.5", 12.5"x12.5"), Square Patchwork Rulers with Double-Coloured Grid Lines, For Measuring and Cutting by Amazon.co.uk

• High-Quality Square Quilt Ruler - Each laser-cut patchwork ruler is constructed of strong acrylic that\u2019s made to last. The kit also includes 48 non slip grip rings to prevent shifting or sliding as you cut.

• Patented Two-Tone Quilter\u2019s Ruler Set - The black and bright green contrasting grid lines allow for easy and precise cutting. Now, you can clearly see what you're measuring or cutting on light and dark fabrics alike.

• Make Accurate Cuts - With a 1/2" seam allowance, you have leeway for more accurate cuts with these, unlike with most quilting squares. Plus, vertical & horizontal measurements let you cut with either left or right hand.

• 4 Sizes Cover All Your Needs - Whether you're quilting, sewing, or crafting, this Quilting Ruler Set will always come in handy. Kit includes four square rulers\u2014a 4 inch, 6 inch, 9 inch, and 12 inch.

• 100% Satisfaction Guarantee: If this sewing ruler set does not perform to your expectations, we\u2019ll happily provide a refund or replacement.