493
xkcd #3138: Dimensional Lumber Tape Measure
(imgs.xkcd.com)
xkcd #3138: Dimensional Lumber Tape Measure
Title text:
A person with two watches is never sure what time it is, especially if I got them one of the watches.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3138/
As if they did not have enough issues with their backwater imperial units...