diff --git a/tcmalloc/global_stats.cc b/tcmalloc/global_stats.cc
index f7f8be821..ae03797c6 100644
--- a/tcmalloc/global_stats.cc
+++ b/tcmalloc/global_stats.cc
@@ -132,6 +132,7 @@ void ExtractStats(TCMallocStats& r, uint64_t* absl_nullable class_count,
     PageHeapSpinLockHolder l;
     r.metadata_bytes = tc_globals.metadata_bytes();
     r.pagemap_bytes = tc_globals.pagemap().bytes();
+    r.pagemap_root_size = tc_globals.pagemap().RootSize();
     r.pageheap = tc_globals.page_allocator().stats();
     r.peak_stats = tc_globals.page_allocator().peak_stats();
     if (small_spans != nullptr) {
@@ -367,6 +368,7 @@ void DumpStats(Printer& out, int level) {
       "MALLOC:   %12u (%7.1f MiB) Table buckets created\n"
       "MALLOC:   %12u (%7.1f MiB) Pagemap bytes used\n"
       "MALLOC:   %12u (%7.1f MiB) Pagemap root resident bytes\n"
+      "MALLOC:   %12u (%7.1f MiB) Pagemap root size\n"
       "MALLOC:   %12u (%7.1f MiB) per-CPU slab bytes used\n"
       "MALLOC:   %12u (%7.1f MiB) per-CPU slab resident bytes\n"
       "MALLOC:   %12u (%7.1f MiB) malloc metadata Arena non-resident bytes\n"
@@ -405,6 +407,7 @@ void DumpStats(Printer& out, int level) {
       uint64_t(stats.pagemap_bytes),
       stats.pagemap_bytes / MiB,
       stats.pagemap_root_bytes_res, stats.pagemap_root_bytes_res / MiB,
+      uint64_t(stats.pagemap_root_size), stats.pagemap_root_size / MiB,
       uint64_t(stats.percpu_metadata_bytes),
       stats.percpu_metadata_bytes / MiB,
       stats.percpu_metadata_bytes_res, stats.percpu_metadata_bytes_res / MiB,
@@ -765,6 +768,7 @@ void DumpStatsInPbtxt(Printer& out, int level) {
                   uint64_t(stats.linked_sample_stats.total));
   region.PrintI64("pagemap_size", uint64_t(stats.pagemap_bytes));
   region.PrintI64("pagemap_root_residence", stats.pagemap_root_bytes_res);
+  region.PrintI64("pagemap_root_size", uint64_t(stats.pagemap_root_size));
   region.PrintI64("percpu_slab_size", stats.percpu_metadata_bytes);
   region.PrintI64("percpu_slab_residence", stats.percpu_metadata_bytes_res);
   region.PrintI64("peak_backed", stats.peak_stats.backed_bytes);
diff --git a/tcmalloc/global_stats.h b/tcmalloc/global_stats.h
index 04b2483e3..68265e497 100644
--- a/tcmalloc/global_stats.h
+++ b/tcmalloc/global_stats.h
@@ -47,6 +47,7 @@ struct TCMallocStats {
   AllocatorStats stack_stats;          // StackTrace objects
   AllocatorStats linked_sample_stats;  // StackTraceTable::LinkedSample objects
   size_t pagemap_bytes;                // included in metadata bytes
+  size_t pagemap_root_size;            // Size of pagemap root node array
   size_t percpu_metadata_bytes;        // included in metadata bytes
   BackingStats pageheap;               // Stats from page heap
   PageAllocator::PeakStats peak_stats;
diff --git a/tcmalloc/pagemap.h b/tcmalloc/pagemap.h
index 6519e246e..602d4de34 100644
--- a/tcmalloc/pagemap.h
+++ b/tcmalloc/pagemap.h
@@ -600,6 +600,8 @@ class PageMap {
     return map_.bytes_used();
   }
 
+  constexpr size_t RootSize() const { return map_.RootSize(); }
+
   [[nodiscard]] void* GetHugepage(PageId p) {
     return map_.get_hugepage(p.index());
   }
diff --git a/tcmalloc/testing/get_stats_test.cc b/tcmalloc/testing/get_stats_test.cc
index 614b2548b..3a3af7e49 100644
--- a/tcmalloc/testing/get_stats_test.cc
+++ b/tcmalloc/testing/get_stats_test.cc
@@ -79,6 +79,7 @@ TEST_F(GetStatsTest, Pbtxt) {
   EXPECT_THAT(buf, ContainsRegex(R"(in_use_by_app: [0-9]+)"));
   EXPECT_THAT(buf, ContainsRegex(R"(page_heap_freelist: [0-9]+)"));
   EXPECT_THAT(buf, ContainsRegex(R"(tcmalloc_huge_page_size: [0-9]+)"));
+  EXPECT_THAT(buf, ContainsRegex(R"(pagemap_root_size: [1-9][0-9]*)"));
 #if defined(GTEST_USES_PCRE)
   EXPECT_THAT(buf,
               ContainsRegex(absl::StrCat(