# Expanding metre sticks [duplicate]

Given the Universe is expanding. Therefore everything within the U is expanding, in all dimensions, subatomic to cosmic. Then all metre sticks are expanding. The question: How can we measure U expansion with metre sticks that are also expanding? Alice only knew she had grown ten feet tall by comparing herself to her surroundings.

• Also we should note that the current expansion rate is about $2\times 10^{-18}/\mathrm{second}$. This tiny expansion is completely swamped by thermal vibrations that are many orders of magnitude greater. – Mark Adler Sep 6 '14 at 4:21