diff --git a/group_edit.php b/group_edit.php
index efa1162f4..3b3cdaf18 100644
--- a/group_edit.php
+++ b/group_edit.php
@@ -77,7 +77,7 @@ if ($is_moderator) {
         'S_HIDDEN_FIELDS' => $s_hidden_fields,
         'S_GROUP_CONFIG_ACTION' => "group_edit.php?" . POST_GROUPS_URL . "=$group_id",
 
-        'AVATAR_EXPLAIN' => sprintf($lang['AVATAR_EXPLAIN'], $bb_cfg['group_avatars']['max_width'], $bb_cfg['group_avatars']['max_height'], (round($bb_cfg['group_avatars']['max_size'] / 1024))),
+        'AVATAR_EXPLAIN' => sprintf($lang['AVATAR_EXPLAIN'], $bb_cfg['group_avatars']['max_width'], $bb_cfg['group_avatars']['max_height'], humn_size($bb_cfg['group_avatars']['max_size'])),
         'AVATAR_IMG' => get_avatar(GROUP_AVATAR_MASK . $group_id, $group_info['avatar_ext_id']),
     ]);
 
diff --git a/library/includes/ucp/register.php b/library/includes/ucp/register.php
index 78639b11a..a4b3ba131 100644
--- a/library/includes/ucp/register.php
+++ b/library/includes/ucp/register.php
@@ -659,7 +659,7 @@ $template->assign_vars([
     'TIMEZONE_SELECT' => \TorrentPier\Legacy\Select::timezone($pr_data['user_timezone'], 'user_timezone'),
     'USER_TIMEZONE' => $pr_data['user_timezone'],
 
-    'AVATAR_EXPLAIN' => sprintf($lang['AVATAR_EXPLAIN'], $bb_cfg['avatars']['max_width'], $bb_cfg['avatars']['max_height'], (round($bb_cfg['avatars']['max_size'] / 1024))),
+    'AVATAR_EXPLAIN' => sprintf($lang['AVATAR_EXPLAIN'], $bb_cfg['avatars']['max_width'], $bb_cfg['avatars']['max_height'], humn_size($bb_cfg['avatars']['max_size'])),
     'AVATAR_DISALLOWED' => bf($pr_data['user_opt'], 'user_opt', 'dis_avatar'),
     'AVATAR_DIS_EXPLAIN' => sprintf($lang['AVATAR_DISABLE'], $bb_cfg['terms_and_conditions_url']),
     'AVATAR_IMG' => get_avatar($pr_data['user_id'], $pr_data['avatar_ext_id'], !bf($pr_data['user_opt'], 'user_opt', 'dis_avatar')),
diff --git a/library/language/source/main.php b/library/language/source/main.php
index 48a2b371e..10ffe3b36 100644
--- a/library/language/source/main.php
+++ b/library/language/source/main.php
@@ -593,7 +593,7 @@ $lang['RESET_AUTOLOGIN'] = 'Reset autologin key';
 $lang['RESET_AUTOLOGIN_EXPL'] = 'including all the places you\'ve visited the forum enabled auto-login';
 
 $lang['AVATAR'] = 'Avatar';
-$lang['AVATAR_EXPLAIN'] = 'Displays a small graphic image below your details in posts. Only one image can be displayed at a time, its width can be no greater than %d pixels, the height no greater than %d pixels, and the file size no more than %d KB.';
+$lang['AVATAR_EXPLAIN'] = 'Displays a small graphic image below your details in posts. Only one image can be displayed at a time, its width can be no greater than %d pixels, the height no greater than %d pixels, and the file size no more than %s.';
 $lang['AVATAR_DELETE'] = 'Delete avatar';
 $lang['AVATAR_DISABLE'] = 'Avatar control option disabled for violation <a href="%s"><b>forum rules</b></a>';
 $lang['UPLOAD_AVATAR_FILE'] = 'Upload avatar';