diff --git a/app/src/main/java/com/hippo/ehviewer/Settings.java b/app/src/main/java/com/hippo/ehviewer/Settings.java
index 311ac4aeb..81d3f761d 100644
--- a/app/src/main/java/com/hippo/ehviewer/Settings.java
+++ b/app/src/main/java/com/hippo/ehviewer/Settings.java
@@ -55,6 +55,7 @@ public class Settings {
 
     private static EhConfig loadEhConfig() {
         EhConfig ehConfig= new EhConfig();
+        ehConfig.imageSize = getImageSize();
         ehConfig.excludedLanguages = getExcludedLanguages();
         ehConfig.defaultCategories = getDefaultCategories();
         ehConfig.excludedNamespaces = getExcludedTagNamespaces();
@@ -591,6 +592,19 @@ public class Settings {
         putIntToStr(KEY_PRELOAD_IMAGE, value);
     }
 
+    public static final String KEY_IMAGE_SIZE = "image_size";
+    public static final String DEFAULT_IMAGE_SIZE = EhConfig.IMAGE_SIZE_AUTO;
+
+    public static String getImageSize() {
+        return getString(KEY_IMAGE_SIZE, DEFAULT_IMAGE_SIZE);
+    }
+
+    public static void putImageSize(String value) {
+        sEhConfig.imageSize = value;
+        sEhConfig.setDirty();
+        putString(KEY_IMAGE_SIZE, value);
+    }
+
     private static final String KEY_DOWNLOAD_ORIGIN_IMAGE = "download_origin_image";
     private static final boolean DEFAULT_DOWNLOAD_ORIGIN_IMAGE = false;
 
diff --git a/app/src/main/java/com/hippo/ehviewer/client/EhConfig.java b/app/src/main/java/com/hippo/ehviewer/client/EhConfig.java
index aba018506..d1650d714 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/EhConfig.java
+++ b/app/src/main/java/com/hippo/ehviewer/client/EhConfig.java
@@ -213,27 +213,27 @@ public class EhConfig implements Cloneable {
     /**
      * Image Size Auto
      */
-    private static final String IMAGE_SIZE_AUTO = "0";
+    public static final String IMAGE_SIZE_AUTO = "a";
     /**
      * Image Size 780x
      */
-    private static final String IMAGE_SIZE_780X = "1";
+    public static final String IMAGE_SIZE_780X = "780";
     /**
      * Image Size 980x
      */
-    private static final String IMAGE_SIZE_980X = "2";
+    public static final String IMAGE_SIZE_980X = "980";
     /**
      * Image Size 1280x
      */
-    private static final String IMAGE_SIZE_1280X = "3";
+    public static final String IMAGE_SIZE_1280X = "1280";
     /**
      * Image Size 1600x
      */
-    private static final String IMAGE_SIZE_1600X = "4";
+    public static final String IMAGE_SIZE_1600X = "1600";
     /**
      * Image Size 2400x
      */
-    private static final String IMAGE_SIZE_2400X = "5";
+    public static final String IMAGE_SIZE_2400X = "2400";
 
     /**
      * Default gallery title
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/fragment/DownloadFragment.java b/app/src/main/java/com/hippo/ehviewer/ui/fragment/DownloadFragment.java
index abc5cc38a..306471921 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/fragment/DownloadFragment.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/fragment/DownloadFragment.java
@@ -35,7 +35,9 @@ import com.hippo.ehviewer.Settings;
 import com.hippo.ehviewer.ui.DirPickerActivity;
 import com.hippo.unifile.UniFile;
 
-public class DownloadFragment extends PreferenceFragment implements Preference.OnPreferenceClickListener {
+public class DownloadFragment extends PreferenceFragment implements
+        Preference.OnPreferenceChangeListener,
+        Preference.OnPreferenceClickListener {
 
     public static final int REQUEST_CODE_PICK_IMAGE_DIR = 0;
     public static final int REQUEST_CODE_PICK_IMAGE_DIR_L = 1;
@@ -50,10 +52,13 @@ public class DownloadFragment extends PreferenceFragment implements Preference.O
         super.onCreate(savedInstanceState);
         addPreferencesFromResource(R.xml.download_settings);
 
+        Preference imageSize = findPreference(Settings.KEY_IMAGE_SIZE);
         mDownloadLocation = findPreference(KEY_DOWNLOAD_LOCATION);
 
         onUpdateDownloadLocation();
 
+        imageSize.setOnPreferenceChangeListener(this);
+
         if (mDownloadLocation != null) {
             mDownloadLocation.setOnPreferenceClickListener(this);
         }
@@ -181,4 +186,16 @@ public class DownloadFragment extends PreferenceFragment implements Preference.O
             }
         }
     }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        String key = preference.getKey();
+        if (Settings.KEY_IMAGE_SIZE.equals(key)) {
+            if (newValue instanceof String) {
+                Settings.putImageSize((String) newValue);
+            }
+            return true;
+        }
+        return false;
+    }
 }
diff --git a/app/src/main/java/com/hippo/preference/ListPreference.java b/app/src/main/java/com/hippo/preference/ListPreference.java
index b15505cd5..25e4ceb6b 100644
--- a/app/src/main/java/com/hippo/preference/ListPreference.java
+++ b/app/src/main/java/com/hippo/preference/ListPreference.java
@@ -25,7 +25,6 @@ import android.support.annotation.ArrayRes;
 import android.support.v7.app.AlertDialog;
 import android.text.TextUtils;
 import android.util.AttributeSet;
-import android.util.Log;
 
 import com.hippo.ehviewer.R;
 
@@ -140,9 +139,6 @@ public class ListPreference extends DialogPreference {
      * @param value The value to set for the key.
      */
     public void setValue(String value) {
-
-        Log.d("TAG", "value = " + value);
-
         // Always persist/notify the first time.
         final boolean changed = !TextUtils.equals(mValue, value);
         if (changed || !mValueSet) {
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index aec40bd9e..414a7bee6 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -423,6 +423,9 @@
     <string name="settings_download_multi_thread_download_summary">最多同时下载 %s 张图片</string>
     <string name="settings_download_preload_image">预载图片</string>
     <string name="settings_download_preload_image_summary">向后预载 %s 张图片</string>
+    <string name="settings_download_image_size">图片大小</string>
+    <string name="settings_download_image_size_summary">%s，大于 1280x 的分辨率可能不好使</string>
+    <string name="settings_download_image_size_auto">自动</string>
     <string name="settings_download_download_origin_image">下载原图</string>
     <string name="settings_download_download_origin_image_summary">这很危险！勾选此项会导致下载配额迅速流失</string>
     <string name="settings_download_restoring">恢复中</string>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 7e4f281d5..3a320421a 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -423,6 +423,9 @@
     <string name="settings_download_multi_thread_download_summary">最多同時下載 %s 張圖片</string>
     <string name="settings_download_preload_image">預載圖片</string>
     <string name="settings_download_preload_image_summary">向後預載 %s 張圖片</string>
+    <string name="settings_download_image_size">圖片大小</string>
+    <string name="settings_download_image_size_summary">%s，大於 1280x 的分辨率可能不好使</string>
+    <string name="settings_download_image_size_auto">自動</string>
     <string name="settings_download_download_origin_image">下載原圖</string>
     <string name="settings_download_download_origin_image_summary">這很危險！勾選此項會導致下載配額迅速流失</string>
     <string name="settings_download_restoring">恢復中</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index befb179b0..7300468d0 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -423,6 +423,9 @@
     <string name="settings_download_multi_thread_download_summary">最多同時下載 %s 張圖片</string>
     <string name="settings_download_preload_image">預載圖片</string>
     <string name="settings_download_preload_image_summary">向後預載 %s 張圖片</string>
+    <string name="settings_download_image_size">圖片大小</string>
+    <string name="settings_download_image_size_summary">%s，大於 1280x 的解析度可能不好使</string>
+    <string name="settings_download_image_size_auto">自動</string>
     <string name="settings_download_download_origin_image">下載原圖</string>
     <string name="settings_download_download_origin_image_summary">這很危險！勾選此項會導致下載配額迅速流失</string>
     <string name="settings_download_restoring">恢復中</string>
diff --git a/app/src/main/res/values/arrays.xml b/app/src/main/res/values/arrays.xml
index dc7334eff..7b6d72288 100644
--- a/app/src/main/res/values/arrays.xml
+++ b/app/src/main/res/values/arrays.xml
@@ -88,6 +88,24 @@
         <item>17</item>
     </string-array>
 
+    <string-array name="image_size_entries" translatable="false">
+        <item>@string/settings_download_image_size_auto</item>
+        <item>780x</item>
+        <item>980x</item>
+        <item>1280x</item>
+        <item>1600x</item>
+        <item>2400x</item>
+    </string-array>
+
+    <string-array name="image_size_entry_values" translatable="false">
+        <item>a</item>
+        <item>780</item>
+        <item>980</item>
+        <item>1280</item>
+        <item>1600</item>
+        <item>2400</item>
+    </string-array>
+
     <string-array name="screen_rotation_entries">
         <item>@string/settings_read_screen_rotation_default</item>
         <item>@string/settings_read_screen_rotation_portrait</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index b95644217..82e1fae54 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -463,6 +463,9 @@
     <string name="settings_download_multi_thread_download_summary">Up to %s images</string>
     <string name="settings_download_preload_image">Preload image</string>
     <string name="settings_download_preload_image_summary">Preload next %s image</string>
+    <string name="settings_download_image_size">Image size</string>
+    <string name="settings_download_image_size_summary">%s, resolutions above 1280x may not work</string>
+    <string name="settings_download_image_size_auto">Auto</string>
     <string name="settings_download_download_origin_image">Download original image</string>
     <string name="settings_download_download_origin_image_summary">It is dangerous! You may get 509 error</string>
     <string name="settings_download_restore_download_items">Restore download items</string>
diff --git a/app/src/main/res/xml/download_settings.xml b/app/src/main/res/xml/download_settings.xml
index f09cf2243..60f67ab64 100644
--- a/app/src/main/res/xml/download_settings.xml
+++ b/app/src/main/res/xml/download_settings.xml
@@ -39,6 +39,14 @@
         app:entryValues="@array/preload_image_entry_values"
         android:defaultValue="5"/>
 
+    <com.hippo.preference.ListPreference
+        android:key="image_size"
+        android:title="@string/settings_download_image_size"
+        android:summary="@string/settings_download_image_size_summary"
+        app:entries="@array/image_size_entries"
+        app:entryValues="@array/image_size_entry_values"
+        android:defaultValue="a"/>
+
     <com.hippo.preference.SwitchPreference
         android:key="download_origin_image"
         android:title="@string/settings_download_download_origin_image"