A measuring device is formed to have one or more joint structures, each joint structure connecting two deformable resilient concave elongated pieces of material (U-channel sections). The joint structure selectively enables the two U-channel sections to be held relative to each other in a substantially overlapping unextended position as well as in a substantially non-overlapping extended position. In both positions, the resilience of the material enables the U-channel sections to be substantially positionally secured relative to each other. The deformable nature of the material enables the U-channel sections to be rotated relative to each other to transition from the collapsed position to the extended position, or from the extended position to the collapsed position. Continuous linear graduated markings are applied to the U-channel sections.
