diff --git a/deploy.sh b/deploy.sh
index 6388e08..fde0e71 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -5,6 +5,8 @@ echo $rootdir
 
 echo "Full Build"
 ./fullbuild.sh
+echo "Update file size"
+./update-file-size.sh
 echo "Building RSS"
 ./mkrss.sh
 echo "RSS Built"
diff --git a/project.el b/project.el
index 9b98333..4a6b3fd 100644
--- a/project.el
+++ b/project.el
@@ -105,6 +105,7 @@
    "<div class=\"rss\"><a href=\"/rss.xml\">RSS</a>: <a href=\"https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Fher.esy.fun%2Frss.xml\">Valid RSS</a></div>"
    (format "<div class=\"date\">Generated: %s</div>"
            (format-time-string "%Y-%m-%d %H:%M:%S"))
+   "<div class=\"web-file-size\">Size: XXK (HTML: XXK, CSS: XXK, IMG: XXK)</div>"
    (format (concat "<div class=\"creator\"> Generated with "
                    "<a href=\"https://www.gnu.org/software/emacs/\" target=\"_blank\" rel=\"noopener noreferrer\">Emacs %s</a>, "
                    "<a href=\"http://spacemacs.org\" target=\"_blank\" rel=\"noopener noreferrer\">Spacemacs %s</a>, "
diff --git a/project.el.sig b/project.el.sig
index 24e5852..d006152 100644
Binary files a/project.el.sig and b/project.el.sig differ
diff --git a/update-file-size.sh b/update-file-size.sh
new file mode 100755
index 0000000..3c13ffc
--- /dev/null
+++ b/update-file-size.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i zsh
+#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+
+webdir="_site"
+
+sizeof() {
+    stat --format="%s" "$*"
+}
+
+debug () {
+   # print -- $*
+}
+
+toh () {
+    numfmt --to=iec $*
+}
+
+tmpdir=$(mktemp -d)
+for fic in $webdir/**/*.html(.); do
+    print -n -- "$fic   "
+
+    htmlsize=$(sizeof $fic)
+    debug HTML: $htmlsize
+
+    xfic=$tmpdir/$fic
+    mkdir -p $(dirname $xfic)
+    hxclean $fic > $xfic
+
+    images=( $( < $xfic hxselect -i -c -s '\n' 'img::attr(src)' | sed 's/^\.\.\///' ) )
+    imgsize=0
+    nbimg=0
+    for i in $images; do
+        ((nbimg++))
+        isize=$( sizeof ${fic:h}/$i )
+        debug $i '=>' $isize
+        (( imgsize += isize ))
+    done
+    debug IMG: $imgsize
+
+    css=( $( < $xfic hxselect -i -c -s '\n' 'link[rel=stylesheet]::attr(href)'))
+    csssize=0
+    for i in $css; do
+        isize=$( sizeof $webdir/$i )
+        debug $i '=>' $isize
+        (( csssize += isize ))
+    done
+    debug CSS: $csssize
+    total=$(( htmlsize + imgsize + csssize ))
+    sizeinfos=$(print -- "Size: $(toh $total) (HTML: $(toh $htmlsize), CSS: $(toh $csssize), IMG: $(toh $imgsize))")
+    print -- $sizeinfos
+    perl -pi -e 's#(<div class="web-file-size">)[^<]*(</div>)#$1'"$sizeinfos"'$2#' $fic
+done
+rm -rf $tmpdir