A good tape measure will not stretch and has measurements on both sides - often centimeters (cms) on one wide and inches on the other.
Better quality tape measures are softer and more flexible; one brand of top-quality tape measures is Hoechstmass.
Note soft and flexible tape-measures made from cloth-like fabric is not good; this kind of tape measure will stretch over time.
Cheaper tape measures are very stiff plastic; they more difficult to work with as they don't 'drape' well. (I find these stiff ones will not stay draped around my neck, they invariably fall off). Given that even the most expensive are still fairly cheap, it is better to get a good quality one.