diff --git a/src/components/XRHud.tsx b/src/components/XRHud.tsx
index 25dab08..9bb8147 100644
--- a/src/components/XRHud.tsx
+++ b/src/components/XRHud.tsx
@@ -297,6 +297,19 @@ export function XRHud({ freeMove, onToggleFreeMove, placementMode = false, onTog
                 </Button>
               )}
 
+              {/* Two-hand scale toggle */}
+              {onToggleAllowScale && (
+                <Button
+                  variant={allowScale ? 'default' : 'outline'}
+                  size="sm" className="h-8 gap-1.5 text-[10px] font-mono"
+                  onClick={onToggleAllowScale}
+                  title="Permite escalar a peça com gesto de duas mãos (afastando os controles)"
+                >
+                  <Maximize2 className="h-3.5 w-3.5" />
+                  {allowScale ? 'Escala ON' : 'Escala'}
+                </Button>
+              )}
+
               <Button
                 variant={freeMove ? 'default' : 'outline'}
                 size="sm" className="h-8 gap-1.5 text-[10px] font-mono"
diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index fc9bd18..c7081d4 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -117,6 +117,7 @@ function GLBModel({ url }: { url: string }) {
   const rotXRad = (fineTuning.rotX * Math.PI) / 180;
   const rotYRad = (fineTuning.rotY * Math.PI) / 180;
   const rotZRad = (fineTuning.rotZ * Math.PI) / 180;
+  const s = fineTuning.scale ?? 1;
 
   return (
     <group
@@ -127,6 +128,7 @@ function GLBModel({ url }: { url: string }) {
         -modelInfo.center.z + fineTuning.posZ,
       ]}
       rotation={[rotXRad, rotYRad, rotZRad]}
+      scale={[s, s, s]}
     >
       <primitive object={scene} />
     </group>