diff --git a/cos-sdk-v5/src/Object/Head.php b/cos-sdk-v5/src/Object/Head.php
new file mode 100644
index 0000000..b25e4d1
--- /dev/null
+++ b/cos-sdk-v5/src/Object/Head.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace SyncQcloudCos\Object;
+
+use Qcloud\Cos\Exception\ServiceResponseException;
+
+class Head
+{
+    public static function getContentLength($client, $bucket, $key)
+    {
+        try {
+            $result = $client->HeadObject(['Bucket' => $bucket, 'Key' => $key]);
+            return $result['ContentLength'] ?? 0;
+        } catch (ServiceResponseException $e) {
+            return 0;
+        }
+    }
+}
diff --git a/readme.txt b/readme.txt
index ab3b5d8..b18ff9a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -5,7 +5,7 @@ Tags: COS, 腾讯云, 对象存储, Tencent, Qcloud
 Requires at least: 4.2
 Tested up to: 6.4
 Requires PHP: 7.2
-Stable tag: 2.5.2
+Stable tag: 2.5.3
 License: Apache2.0
 License URI: http://www.apache.org/licenses/LICENSE-2.0.html
 
@@ -100,7 +100,7 @@ License URI: http://www.apache.org/licenses/LICENSE-2.0.html
 
 = Stable =
 
-- Support gif for image slim
+- Fix get non-image file size error
 
 = Other =
 
diff --git a/sync-qcloud-cos.php b/sync-qcloud-cos.php
index fb3ff21..c73e9c1 100644
--- a/sync-qcloud-cos.php
+++ b/sync-qcloud-cos.php
@@ -3,7 +3,7 @@
 Plugin Name: Sync QCloud COS
 Plugin URI: https://qq52o.me/2518.html
 Description: 使用腾讯云对象存储服务 COS 作为附件存储空间。(Using Tencent Cloud Object Storage Service COS as Attachment Storage Space.)
-Version: 2.5.2
+Version: 2.5.3
 Author: 沈唁
 Author URI: https://qq52o.me
 License: Apache2.0
@@ -25,8 +25,9 @@
 use SyncQcloudCos\ErrorCode;
 use SyncQcloudCos\Monitor\Charts;
 use SyncQcloudCos\Monitor\DataPoints;
+use SyncQcloudCos\Object\Head;
 
-define('COS_VERSION', '2.5.2');
+define('COS_VERSION', '2.5.3');
 define('COS_PLUGIN_SLUG', 'sync-qcloud-cos');
 define('COS_PLUGIN_PAGE', plugin_basename(dirname(__FILE__)) . '%2F' . basename(__FILE__));
 
@@ -614,6 +615,24 @@ function cos_plugin_action_links($links, $file)
 add_filter('the_content', 'cos_setting_content_ci');
 add_filter('post_thumbnail_html', 'cos_setting_post_thumbnail_ci', 10, 3);
 add_filter('wp_calculate_image_srcset', 'cos_custom_image_srcset', 10, 5);
+add_filter('wp_prepare_attachment_for_js', 'cos_wp_prepare_attachment_for_js');
+
+function cos_wp_prepare_attachment_for_js($response)
+{
+    if (empty($response['filesizeInBytes']) || empty($response['filesizeHumanReadable'])) {
+        $cos_options = get_option('cos_options', true);
+        $upload_url_path = esc_attr($cos_options['upload_url_path']);
+        $upload_path = get_option('upload_path');
+        $object = str_replace($upload_url_path, $upload_path, $response['url']);
+        $contentLength = Head::getContentLength(cos_get_client($cos_options), cos_get_bucket_name($cos_options), $object);
+        if (!empty($contentLength)) {
+            $response['filesizeInBytes'] = $contentLength;
+            $response['filesizeHumanReadable'] = size_format($contentLength);
+        }
+    }
+
+    return $response;
+}
 
 function cos_custom_image_srcset($sources, $size_array, $image_src, $image_meta, $attachment_id)
 {