diff --git a/src/VariableSizeList.js b/src/VariableSizeList.js
index 4bec6b78..24fc0473 100644
--- a/src/VariableSizeList.js
+++ b/src/VariableSizeList.js
@@ -147,6 +147,7 @@ const getEstimatedTotalSize = (
   let totalSizeOfMeasuredItems = 0;
 
   if (lastMeasuredIndex >= 0) {
+    if (lastMeasuredIndex >= itemMetadataMap.length) lastMeasuredIndex = itemMetadataMap.length - 1;
     const itemMetadata = itemMetadataMap[lastMeasuredIndex];
     totalSizeOfMeasuredItems = itemMetadata.offset + itemMetadata.size;
   }