diff --git a/README.md b/README.md
index 22bc8ca..aad5a83 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ var line = L.polyline(coords);
 
 // override defaults
 var line = L.polyline(coords, {
-	distanceMarkers: { showAll: 11, offset: 1600, cssClass: 'some-other-class' }
+	distanceMarkers: { showAll: 11, offset: 1600, cssClass: 'some-other-class', iconSize: [16, 16] }
 });
 
 // show/hide markers on mouseover
@@ -31,6 +31,7 @@ map.addLayer(line);
  * **showAll**: the zoom level at which all distance markers will be shown -- zooming out once from this level will remove approximately half of the markers (default: 12)
  * **lazy**: postpone adding the markers until Polyline.addDistanceMarkers is explicitly called (default: false)
  * **cssClass**: CSS class to set on marker icons
+ * **iconSize**: size of the marker icon in pixels; type: [L.Point](http://leafletjs.com/reference.html#point) or array (default: `[12, 12]`); set to `null` to allow sizing via CSS class (see example on `icon-size` branch)
 
 ## Requirements