diff --git a/include/mimalloc/types.h b/include/mimalloc/types.h
index 788d1731..c8c10a2a 100644
--- a/include/mimalloc/types.h
+++ b/include/mimalloc/types.h
@@ -195,9 +195,9 @@ typedef int32_t  mi_ssize_t;
 
 // The max object size are checked to not waste more than 12.5% internally over the page sizes.
 // (Except for large pages since huge objects are allocated in 4MiB chunks)
-#define MI_SMALL_OBJ_SIZE_MAX             (MI_SMALL_PAGE_SIZE/4)   // 16KiB
-#define MI_MEDIUM_OBJ_SIZE_MAX            (MI_MEDIUM_PAGE_SIZE/4)  // 128KiB
-#define MI_LARGE_OBJ_SIZE_MAX             (MI_LARGE_PAGE_SIZE/2)   // 2MiB
+#define MI_SMALL_OBJ_SIZE_MAX             (MI_SMALL_PAGE_SIZE/8)   // 8 KiB
+#define MI_MEDIUM_OBJ_SIZE_MAX            (MI_MEDIUM_PAGE_SIZE/8)  // 64 KiB
+#define MI_LARGE_OBJ_SIZE_MAX             (MI_LARGE_PAGE_SIZE/4)   // 1 MiB
 #define MI_LARGE_OBJ_WSIZE_MAX            (MI_LARGE_OBJ_SIZE_MAX/MI_INTPTR_SIZE)
 
 // Maximum number of size classes. (spaced exponentially in 12.5% increments)