diff --git a/tracers.ts/src/tracers/array-tracer.ts b/tracers.ts/src/tracers/array-tracer.ts
index 8e34016..d314bee 100644
--- a/tracers.ts/src/tracers/array-tracer.ts
+++ b/tracers.ts/src/tracers/array-tracer.ts
@@ -23,6 +23,7 @@ export const createArrayTracer = <T extends JsonValue>(
 
   const buildInitial = () => {
     if (!!initial) {
+      metadata.length = initial.length;
       return [...initial];
     }
     if (!!walker) {
@@ -30,6 +31,7 @@ export const createArrayTracer = <T extends JsonValue>(
       walker({
         add: (item) => {
           initial.push(item);
+          metadata.length++;
         },
       });
       return initial;