@vaadin/vaadin-lumo-styles/src/props/sizing.css

Lumo is a design system foundation for modern web applications, used by Vaadin components

/**
 * @license
 * Copyright (c) 2017 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
:where(:root),
:where(:host) {
  --lumo-size-xs: 1.625rem;
  --lumo-size-s: 1.875rem;
  --lumo-size-m: 2.25rem;
  --lumo-size-l: 2.75rem;
  --lumo-size-xl: 3.5rem;

  /* Icons */
  --lumo-icon-size-s: 1.25em;
  --lumo-icon-size-m: 1.5em;
  --lumo-icon-size-l: 2.25em;
  /* For backwards compatibility */
  --lumo-icon-size: var(--lumo-icon-size-m);
}