diff --git a/x-pack/legacy/plugins/maps/public/layers/styles/vector/properties/static_size_property.js b/x-pack/legacy/plugins/maps/public/layers/styles/vector/properties/static_size_property.js
index 1584dec99898..024b44636985 100644
--- a/x-pack/legacy/plugins/maps/public/layers/styles/vector/properties/static_size_property.js
+++ b/x-pack/legacy/plugins/maps/public/layers/styles/vector/properties/static_size_property.js
@@ -26,7 +26,8 @@ export class StaticSizeProperty extends StaticStyleProperty {
 
   syncIconImageAndSizeWithMb(symbolLayerId, mbMap, symbolId) {
     const iconPixels =
-      this._size >= HALF_LARGE_MAKI_ICON_SIZE ? LARGE_MAKI_ICON_SIZE : SMALL_MAKI_ICON_SIZE;
+      this._options.size >= HALF_LARGE_MAKI_ICON_SIZE ? LARGE_MAKI_ICON_SIZE : SMALL_MAKI_ICON_SIZE;
+
     mbMap.setLayoutProperty(symbolLayerId, 'icon-image', `${symbolId}-${iconPixels}`);
     const halfIconPixels = iconPixels / 2;
     mbMap.setLayoutProperty(symbolLayerId, 'icon-size', this._options.size / halfIconPixels);