diff --git a/cachelib/allocator/CacheItem.h b/cachelib/allocator/CacheItem.h
index 2b474d48a3..fc45b2084d 100644
--- a/cachelib/allocator/CacheItem.h
+++ b/cachelib/allocator/CacheItem.h
@@ -472,8 +472,8 @@ class CACHELIB_PACKED_ATTR CacheItem {
 // |  a |       | y |      |
 // |  t |       | l |      |
 // |  i |       | o |      |
-// |  o |       | d |      |
-// |  n |       |   |      |
+// |  o |       | a |      |
+// |  n |       | d |      |
 // | --------------------- |
 template <typename CacheTrait>
 class CACHELIB_PACKED_ATTR CacheChainedItem : public CacheItem<CacheTrait> {
diff --git a/website/docs/Cache_Library_User_Guides/Write_data_to_cache.md b/website/docs/Cache_Library_User_Guides/Write_data_to_cache.md
index 11a998cf62..a046735ad7 100644
--- a/website/docs/Cache_Library_User_Guides/Write_data_to_cache.md
+++ b/website/docs/Cache_Library_User_Guides/Write_data_to_cache.md
@@ -78,9 +78,11 @@ auto parent_item_handle = cache->allocate(pool_id, "parent", size);
 
 if (parent_item_handle) {
   // Call allocateChainedItem() to allocate memory for 3 chained items.
-  auto chained_item_handle_1 = cache->allocateChainedItem(parent_item_handle, 2 * size);
-  auto chained_item_handle_2 = cache->allocateChainedItem(parent_item_handle, 4 * size);
-  auto chained_item_handle_3 = cache->allocateChainedItem(parent_item_handle, 6 * size);
+  // 4 * size is invalid, Because there are other costs, see getRequiredSize().
+  // But you can create more chained items.
+  auto chained_item_handle_1 = cache->allocateChainedItem(parent_item_handle, 1 * size);
+  auto chained_item_handle_2 = cache->allocateChainedItem(parent_item_handle, 2 * size);
+  auto chained_item_handle_3 = cache->allocateChainedItem(parent_item_handle, 3 * size);
 }
 ```
 
diff --git a/website/docs/Cache_Library_User_Guides/chained_items.md b/website/docs/Cache_Library_User_Guides/chained_items.md
index 6ab8602ba7..dcaf68408a 100644
--- a/website/docs/Cache_Library_User_Guides/chained_items.md
+++ b/website/docs/Cache_Library_User_Guides/chained_items.md
@@ -97,7 +97,7 @@ std::unique_ptr<LargeUserData> userData = getLargeUserData();
 size_t userDataSize = sizeof(LargeUserData) + sizeof(int) * userData->length;
 
 // For simplicity, we'll split the user data into 1MB chunks
-size_t numChunks = userDataSize / (1024 * 1024 * 1024);
+size_t numChunks = userDataSize / (1024 * 1024);
 
 struct CustomParentItem {
   size_t numChunks;