Today's designers need more than just inches to layout their sketches. The Lindlund Creative Ruler was made for them. Cut from high-grade aluminum, it offers the traditional measurements of inches and centimeters, plus both picas and pixels. The latter has a simulated ppi of 150, as well as indications for the sizes of iPhone and iPad screens. A rubber coating on the back keeps it securely in place, and the four measurements make it easy to create 90-degree angles. Available with a black or silver anodized finish. $25