diff --git a/app/index.html b/app/index.html
index 8402100..643ee1b 100644
--- a/app/index.html
+++ b/app/index.html
@@ -66,19 +66,25 @@
                         </li>
                         <li>
                             <a class="pointer-cursor" ng-click="changeDisplayOrder('name')">
-                                <span translate>File Name</span>
+                                <span translate>By File Name</span>
                                 <i class="fa" ng-class="{'fa-check': isSetDisplayOrder('name')}"></i>
                             </a>
                         </li>
+                        <li>
+                            <a class="pointer-cursor" ng-click="changeDisplayOrder('size')">
+                                <span translate>By File Size</span>
+                                <i class="fa" ng-class="{'fa-check': isSetDisplayOrder('size')}"></i>
+                            </a>
+                        </li>
                         <li>
                             <a class="pointer-cursor" ng-click="changeDisplayOrder('percent')">
-                                <span translate>Completed Percent</span>
+                                <span translate>By Completed Percent</span>
                                 <i class="fa" ng-class="{'fa-check': isSetDisplayOrder('percent')}"></i>
                             </a>
                         </li>
                         <li>
                             <a class="pointer-cursor" ng-click="changeDisplayOrder('remain')">
-                                <span translate>Remain Time</span>
+                                <span translate>By Remain Time</span>
                                 <i class="fa" ng-class="{'fa-check': isSetDisplayOrder('remain')}"></i>
                             </a>
                         </li>
diff --git a/app/scripts/controllers/list.js b/app/scripts/controllers/list.js
index 447d089..289b015 100644
--- a/app/scripts/controllers/list.js
+++ b/app/scripts/controllers/list.js
@@ -29,7 +29,9 @@
         };
 
         var processDownloadTask = function (task) {
-            var remainLength = task.totalLength - task.completedLength;
+            var totalLength = parseInt(task.totalLength);
+            var completedLength = parseInt(task.completedLength);
+            var remainLength = totalLength - completedLength;
 
             if (task.bittorrent && task.bittorrent.info) {
                 task.taskName = task.bittorrent.info.name;
@@ -39,7 +41,8 @@
                 task.taskName = translateFilter('Unknown');
             }
 
-            task.completePercent = task.completedLength / task.totalLength * 100;
+            task.fileSize = totalLength;
+            task.completePercent = completedLength / totalLength * 100;
             task.idle = task.downloadSpeed == 0;
             task.remainTime = calculateDownloadRemainTime(remainLength, task.downloadSpeed);
         };
diff --git a/app/scripts/filters/taskOrderBy.js b/app/scripts/filters/taskOrderBy.js
index e1d9532..35f2f85 100644
--- a/app/scripts/filters/taskOrderBy.js
+++ b/app/scripts/filters/taskOrderBy.js
@@ -9,6 +9,8 @@
 
             if (type == 'name') {
                 return orderByFilter(array, ['taskName'], false);
+            } else if (type == 'size') {
+                return orderByFilter(array, ['fileSize'], false);
             } else if (type == 'percent') {
                 return orderByFilter(array, ['completePercent'], true);
             } else if (type == 'remain') {
diff --git a/app/scripts/langs/en-US.js b/app/scripts/langs/en-US.js
index 43268a5..407e51d 100644
--- a/app/scripts/langs/en-US.js
+++ b/app/scripts/langs/en-US.js
@@ -9,9 +9,10 @@
             'Delete': 'Delete',
             'Display Order': 'Display Order',
             'Default': 'Default',
-            'File Name': 'File Name',
-            'Completed Percent': 'Completed Percent',
-            'Remain Time': 'Remain Time',
+            'By File Name': 'By File Name',
+            'By File Size': 'By File Size',
+            'By Completed Percent': 'By Completed Percent',
+            'By Remain Time': 'By Remain Time',
             'Settings': 'Settings',
             'Download': 'Download',
             'Downloading': 'Downloading',
diff --git a/app/scripts/langs/zh-CN.js b/app/scripts/langs/zh-CN.js
index 23d414a..d4290cc 100644
--- a/app/scripts/langs/zh-CN.js
+++ b/app/scripts/langs/zh-CN.js
@@ -9,9 +9,10 @@
             'Delete': '删除下载任务',
             'Display Order': '显示顺序',
             'Default': '默认',
-            'File Name': '文件名',
-            'Completed Percent': '完成度',
-            'Remain Time': '剩余时间',
+            'By File Name': '按文件名',
+            'By File Size': '按文件大小',
+            'By Completed Percent': '按完成度',
+            'By Remain Time': '按剩余时间',
             'Settings': '系统设置',
             'Download': '下载',
             'Downloading': '正在下载',