diff --git a/packages/kit/src/core/adapt/builder.js b/packages/kit/src/core/adapt/builder.js
index 18a9d9205784..28973a91c79f 100644
--- a/packages/kit/src/core/adapt/builder.js
+++ b/packages/kit/src/core/adapt/builder.js
@@ -131,11 +131,7 @@ export function create_builder({
 				route_data.filter((route) => prerender_map.get(route.id) !== true),
 				vite_config.root
 			);
-			/** @type {Record<string, number>} */
-			const files = {};
 			for (const file of server_assets) {
-				files[file] = statSync(path.resolve(build_data.out_dir, 'server', file)).size;
-
 				const ext = path.extname(file);
 				mime_types[ext] ??= mime_lookup(ext) || '';
 			}
diff --git a/packages/kit/src/core/sync/create_manifest_data/index.js b/packages/kit/src/core/sync/create_manifest_data/index.js
index 7b0b51a3ab3d..9e274c9026bb 100644
--- a/packages/kit/src/core/sync/create_manifest_data/index.js
+++ b/packages/kit/src/core/sync/create_manifest_data/index.js
@@ -82,7 +82,6 @@ export function create_assets(config) {
 
 	return [...walk(config.files.assets)].map((file) => ({
 		file,
-		size: fs.statSync(path.resolve(config.files.assets, file)).size,
 		type: lookup(file) || null
 	}));
 }
diff --git a/packages/kit/src/core/sync/create_manifest_data/index.spec.js b/packages/kit/src/core/sync/create_manifest_data/index.spec.js
index 915dbaec7399..c3070be5fee3 100644
--- a/packages/kit/src/core/sync/create_manifest_data/index.spec.js
+++ b/packages/kit/src/core/sync/create_manifest_data/index.spec.js
@@ -731,12 +731,10 @@ test('lists static assets', () => {
 	expect(assets).toEqual([
 		{
 			file: 'bar/baz.txt',
-			size: 14,
 			type: 'text/plain'
 		},
 		{
 			file: 'foo.txt',
-			size: 9,
 			type: 'text/plain'
 		}
 	]);
diff --git a/packages/kit/src/types/internal.d.ts b/packages/kit/src/types/internal.d.ts
index 8a107863f31a..d5d3d9c76f86 100644
--- a/packages/kit/src/types/internal.d.ts
+++ b/packages/kit/src/types/internal.d.ts
@@ -55,7 +55,6 @@ export interface ServerInternalModule {
 
 export interface Asset {
 	file: string;
-	size: number;
 	type: string | null;
 }