@sequencemedia/css-purge/src/utils/get-file-size-in-kb.mjs

A CSS tool written in Node JS as a command line app or library for the purging, burning, reducing, shortening, compressing, cleaning, trimming and formatting of duplicate, extra, excess or bloated CSS.

import {
  statSync
} from 'node:fs'

export default function getFileSizeInKB (filePath) {
  const {
    size
  } = statSync(filePath)

  return (size || 0) / 1000
}