plastic folding ruler

Most folding plastic rulers are made from PET (polyethylene terephthalate). Some models use TPU (thermoplastic polyurethane) for added flexibility.

Many folding meter sticks and rulers include both metric and imperial markings, such as meters, centimeters, millimeters, and inches.

Some folding film rulers include an R-angle or radius feature designed to measure radii and rounded corners (radius/fillet measurements).

Folding plastic rulers are highly portable: many models fold multiple times to a compact size. For example, some one-meter sticks fold into four sections so they easily fit in backpacks, drawers, or pencil cases.

Fan-shaped scale rulers commonly include multiple proportional scales, for example: 1:10, 1:15, 1:20, 1:25, 1:30, 1:33 1/3, 1:40, 1:50, 1:75, and 1:125.

Some fan-style scale rulers come with protective accessories such as a leather case; product listings commonly show the package contents like "1 x Scale Ruler."