diff --git a/src/components/three/XRHudInWorld.tsx b/src/components/three/XRHudInWorld.tsx
index 29db575..182ff60 100644
--- a/src/components/three/XRHudInWorld.tsx
+++ b/src/components/three/XRHudInWorld.tsx
@@ -382,6 +382,15 @@ function ToolsTab(p: XRHudInWorldProps) {
             onClick={() => setScaleRatio(preset)} />
         );
       })}
+      {/* Reset Escala — devolve a peça ao tamanho 1:1 (cancela qualquer
+          escala manual feita com duas mãos). */}
+      <XR3DButton position={[0.10, -0.11, 0]} size={[0.062, 0.022]}
+        label="↺ Reset" color="#dc2626"
+        onClick={resetScale} fontSize={0.0085} />
+      {/* Limpa todos os labels de medição. */}
+      <XR3DButton position={[0.17, -0.11, 0]} size={[0.062, 0.022]}
+        label="✕ Medidas" color="#dc2626"
+        onClick={clearMeasurements} fontSize={0.0085} />
 
       {/* Grid floor controls */}
       <GridFloorRow />