<!-- based on input-text-size-1.html, but using a CFF font with 2048-unit em square -->
<html lang="en">
<head>
<style type="text/css">
@font-face {
  font-family: test;
  src: url(../fonts/DejaVuSansMono.otf);
}
</style>
</head>
<body>
  <input size="5" value="1 3 5" style="font-family: test">
</body>
</html>