diff --git a/src/mini_format_pack/config.json b/src/mini_format_pack/config.json
index a9bca22..555e20a 100644
--- a/src/mini_format_pack/config.json
+++ b/src/mini_format_pack/config.json
@@ -1,5 +1,10 @@
 {
     "actions": [
+        {
+            "name": "setFontSize",
+            "tooltip": "Change font size",
+            "hotkey": "ctrl+shift+s"
+        },
         {
             "name": "strikeThrough",
             "tooltip": "Apply strikethrough",
@@ -68,4 +73,4 @@
             "hotkey": "ctrl+shift+alt+b"
         }
     ]
-}
\ No newline at end of file
+}
diff --git a/src/mini_format_pack/icons/setFontSize.png b/src/mini_format_pack/icons/setFontSize.png
new file mode 100644
index 0000000..69a7058
Binary files /dev/null and b/src/mini_format_pack/icons/setFontSize.png differ
diff --git a/src/mini_format_pack/main.py b/src/mini_format_pack/main.py
index eefc698..9dbe8b5 100644
--- a/src/mini_format_pack/main.py
+++ b/src/mini_format_pack/main.py
@@ -14,6 +14,7 @@
 
 from aqt import mw
 from aqt.qt import *
+from aqt.utils import getOnlyText
 from anki.hooks import addHook
 from anki.utils import isWin, isMac
 
@@ -40,6 +41,11 @@ def strikeThrough(editor):
     editor.web.eval("setFormat('strikeThrough')")
 
 
+def setFontSize(editor):
+    fs = getOnlyText(_("New font size:"), default="5")
+    editor.web.eval("setFormat('fontSize', '{}px');".format(fs))
+
+
 def indent(editor):
     editor.web.eval("setFormat('indent')")