diff --git a/react-list.es6 b/react-list.es6
index 0d6fd2d..db70caf 100644
--- a/react-list.es6
+++ b/react-list.es6
@@ -332,6 +332,10 @@ module.exports = class ReactList extends Component {
   }
 
   cacheSizes() {
+    // is hidden
+    if (findDOMNode(this).offsetParent === null) {
+      return;
+    }
     const {cache} = this;
     const {from} = this.state;
     const itemEls = findDOMNode(this.items).children;
diff --git a/react-list.js b/react-list.js
index 4706aa4..012dea0 100644
--- a/react-list.js
+++ b/react-list.js
@@ -448,6 +448,10 @@
     }, {
       key: 'cacheSizes',
       value: function cacheSizes() {
+        // is hidden
+        if (findDOMNode(this).offsetParent === null) {
+          return;
+        }
         var cache = this.cache;
         var from = this.state.from;