diff --git a/lib/process/process-cues.js b/lib/process/process-cues.js
index 3e83be73..1c2ef65a 100644
--- a/lib/process/process-cues.js
+++ b/lib/process/process-cues.js
@@ -50,7 +50,7 @@ var processCues = function(window, cues, overlay) {
 
   var boxPositions = [],
       containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),
-      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;
+      fontSize = Math.round(Math.min(containerBox.width, containerBox.height) * FONT_SIZE_PERCENT * 100) / 100;
   var styleOptions = {
     font: fontSize + "px " + FONT_STYLE
   };