Venue   Wales Mathematics Colloquium 2016 Summary   This was the second of two talks over two days. The first was entitled The many faces of magnitude, gave a general overview of invariants of size in mathematics, and was an updated version of this talk. This second talk is wholly about the magnitude of metric spaces. References are on the final slide. Slides   In this pdf file.   This page was last changed on 1 January 2017. You can read an extremely short introduction to Beamer, or go home.