3mm LETTER RULER by Nico Ng. Creating custom letters can be challenging. The Letter Ruler simplifies the process of sketching accurate letter construction guides, enabling you to create your beautiful & unique letters easily! This lettering tool is designed to help you sketch letters with consistency and aid you in properly spacing out letters. Product Details: 54mm x 133mm. 1.5mm clear acrylic. Laser cut & laser engraved. Features: 7 x 15 grid system (3mm). Center Guide Line. Edge Measurement Lines. Circular Template Set. For more details about the product, check out this website: www.CompositionRuler.com/letterruler.