Tape Measure

This item is used to measure distances. In absolute measurement mode, right-clicking on a block selects a block, then right-clicking on any other block will give the distance between those blocks to the nearest meter. This works across angles, but will be slightly less accurate. Right-clicking the Tape Measure with no block selected will change to individual measurement mode, which will return separate measurements, in blocks/meters for each direction, north/south, east/west, and height. Dimensions are only returned if the measured distance is greater than 0.
Tape Measures can be used to rotate items on the Table by right clicking on any of the 4 sides of the table.
This is a 2 part recipe; first you must craft a tape reel. Then, using the tape reel, you can craft a tape measure. 

Crafting

Reel

Tape Measure