diff --git a/include/mimalloc.h b/include/mimalloc.h
index 5e4c3743..39303669 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -256,6 +256,7 @@ typedef struct mi_heap_area_s {
   size_t committed;   // current available bytes for this area
   size_t used;        // number of allocated blocks
   size_t block_size;  // size in bytes of each block
+  size_t full_block_size; // size in bytes of a full block including padding and metadata.
 } mi_heap_area_t;
 
 typedef bool (mi_cdecl mi_block_visit_fun)(const mi_heap_t* heap, const mi_heap_area_t* area, void* block, size_t block_size, void* arg);
diff --git a/src/heap.c b/src/heap.c
index 91d2bc42..816d961a 100644
--- a/src/heap.c
+++ b/src/heap.c
@@ -481,13 +481,14 @@ static bool mi_heap_area_visit_blocks(const mi_heap_area_ex_t* xarea, mi_block_v
   if (page->used == 0) return true;
 
   const size_t bsize = mi_page_block_size(page);
+  const size_t ubsize = mi_page_usable_block_size(page); // without padding
   size_t   psize;
   uint8_t* pstart = _mi_page_start(_mi_page_segment(page), page, &psize);
 
   if (page->capacity == 1) {
     // optimize page with one block
     mi_assert_internal(page->used == 1 && page->free == NULL);
-    return visitor(mi_page_heap(page), area, pstart, bsize, arg);
+    return visitor(mi_page_heap(page), area, pstart, ubsize, arg);
   }
 
   // create a bitmap of free blocks.
@@ -521,7 +522,7 @@ static bool mi_heap_area_visit_blocks(const mi_heap_area_ex_t* xarea, mi_block_v
     else if ((m & ((uintptr_t)1 << bit)) == 0) {
       used_count++;
       uint8_t* block = pstart + (i * bsize);
-      if (!visitor(mi_page_heap(page), area, block, bsize, arg)) return false;
+      if (!visitor(mi_page_heap(page), area, block, ubsize, arg)) return false;
     }
   }
   mi_assert_internal(page->used == used_count);
@@ -537,12 +538,14 @@ static bool mi_heap_visit_areas_page(mi_heap_t* heap, mi_page_queue_t* pq, mi_pa
   mi_heap_area_visit_fun* fun = (mi_heap_area_visit_fun*)vfun;
   mi_heap_area_ex_t xarea;
   const size_t bsize = mi_page_block_size(page);
+  const size_t ubsize = mi_page_usable_block_size(page);
   xarea.page = page;
   xarea.area.reserved = page->reserved * bsize;
   xarea.area.committed = page->capacity * bsize;
   xarea.area.blocks = _mi_page_start(_mi_page_segment(page), page, NULL);
   xarea.area.used = page->used * bsize;
-  xarea.area.block_size = bsize;
+  xarea.area.block_size = ubsize;
+  xarea.area.full_block_size = bsize;
   return fun(heap, &xarea, arg);
 }
 
diff --git a/test/main-override-static.c b/test/main-override-static.c
index 07116503..63d90bb0 100644
--- a/test/main-override-static.c
+++ b/test/main-override-static.c
@@ -18,6 +18,7 @@ static void test_process_info(void);
 static void test_reserved(void);
 static void negative_stat(void);
 static void alloc_huge(void);
+static void test_heap_walk(void);
 
 int main() {
   mi_version();
@@ -31,7 +32,8 @@ int main() {
   // invalid_free();
   // test_reserved();
   // negative_stat();
-  alloc_huge();
+  // alloc_huge();
+  test_heap_walk();
   
   void* p1 = malloc(78);
   void* p2 = malloc(24);
@@ -51,8 +53,10 @@ int main() {
   //free(p1);
   //p2 = malloc(32);
   //mi_free(p2);
-  mi_collect(true);
-  mi_stats_print(NULL);
+  
+  //mi_collect(true);
+  //mi_stats_print(NULL);
+  
   // test_process_info();
   return 0;
 }
@@ -189,6 +193,19 @@ static void alloc_huge(void) {
   mi_free(p);
 }
 
+static bool test_visit(const mi_heap_t* heap, const mi_heap_area_t* area, void* block, size_t block_size, void* arg) {
+  printf("I'm visiting a block of size %zu, allocated size %zu\n", block_size, mi_usable_size(block));
+  return true;
+}
+
+static void test_heap_walk(void) {
+  mi_heap_t* heap = mi_heap_new();
+  //mi_heap_malloc(heap, 2097152);
+  mi_heap_malloc(heap, 2067152);
+  mi_heap_malloc(heap, 2097160);
+  mi_heap_malloc(heap, 24576);
+  mi_heap_visit_blocks(heap, true, &test_visit, NULL);
+}
 
 // ----------------------------
 // bin size experiments
@@ -360,4 +377,4 @@ static void mi_bins(void) {
     last_bsize = bsize;
   }
 }
-#endif
\ No newline at end of file
+#endif