diff --git a/src/pages/XRSession.tsx b/src/pages/XRSession.tsx
index d2df4a7..74960ec 100644
--- a/src/pages/XRSession.tsx
+++ b/src/pages/XRSession.tsx
@@ -117,19 +117,23 @@ function XRModel({ url }: { url: string }) {
   const rotYRad = (fineTuning.rotY * Math.PI) / 180;
   const rotZRad = (fineTuning.rotZ * Math.PI) / 180;
   const s = fineTuning.scale ?? 1;
+  const scaleRatio = useModelStore((st) => st.scaleRatio);
+  const renderFactor = scaleRatio?.factor ?? 1;
 
   return (
-    <group
-      ref={ref}
-      position={[
-        -modelInfo.center.x + fineTuning.posX,
-        -modelInfo.center.y + fineTuning.posY,
-        -modelInfo.center.z + fineTuning.posZ,
-      ]}
-      rotation={[rotXRad, rotYRad, rotZRad]}
-      scale={[s, s, s]}
-    >
-      <primitive object={scene} />
+    <group scale={[renderFactor, renderFactor, renderFactor]}>
+      <group
+        ref={ref}
+        position={[
+          -modelInfo.center.x + fineTuning.posX,
+          -modelInfo.center.y + fineTuning.posY,
+          -modelInfo.center.z + fineTuning.posZ,
+        ]}
+        rotation={[rotXRad, rotYRad, rotZRad]}
+        scale={[s, s, s]}
+      >
+        <primitive object={scene} />
+      </group>
     </group>
   );
 }