Straight-edge metal rulers are offered in five sizes: 12, 15, 18, 24, and 36 inches.
The selection includes soft, flexible tailor tapes for measuring curves and the body, plus compact retractable tapes for portability. Many sets pair one flexible tape with a retractable tape.
Many tapes and some rulers display both imperial and metric units — typically inches on one side and centimeters on the other.
Some metal straight-edge rulers include a cork backing that prevents slippage and helps protect surfaces from scratches while measuring.
The tapes commonly measure from about 60 inches (150 cm) up to 79 inches (200 cm).
Retractable tapes are compact and retract smoothly into a protective case for tangle-free storage, making them easy to carry in a sewing kit, purse, or toolbox.
Markings are described as clear and easy to read. Some tapes use high-contrast color schemes — for example, a yellow background with bold black markings — to improve visibility.