<!DOCTYPE html>
<title>Flexbox: margins and available space</title>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#algo-main-item" title="Case E">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<meta name="assert" content="An item's inline margins are subtracted from available space when laying out to determine flex-basis in a column container." />

<style>
.inline-block {
  display: inline-bl