Raw size isn't enough
A few months ago there was a sequence of posts to Hacker News about various “clubs” you could post your small website on: the 1MB Club, 512KB Club, 250KB Club, and even the 10KB Club. I think those are a fun indicator of renewed interested in minimalism, but I will say that raw size isn’t enough – a 2KB site with no real content isn’t much good, and a page with 512KB of very slow JavaScript is worse than a snappy site with 4MB of well-chosen images.
...[Instead, it's about] an “ethos of small”. It’s caring about the users of your site: that your pages download fast, are easy to read, have interesting content, and don’t load scads of JavaScript for Google or Facebook’s trackers.