{{ $image := "/img/favicon.png" }}
{{ $sizes := slice 16 32 64 100 200 }}

{{ range $sizes }}
  {{ $sizes := printf "%dx%d" . . }}
  <link rel="icon" type="image/png" sizes="{{ $sizes }}"
    href='{{ ((resources.Get $image | fingerprint).Resize $sizes).RelPermalink }}'>
{{ end }}