diff --git a/frontend/apps/cloudstorage/cloudstorage.lua b/frontend/apps/cloudstorage/cloudstorage.lua
index addf0bb2f..b13ddf7c6 100644
--- a/frontend/apps/cloudstorage/cloudstorage.lua
+++ b/frontend/apps/cloudstorage/cloudstorage.lua
@@ -19,6 +19,7 @@ local logger = require("logger")
 local _ = require("gettext")
 local N_ = _.ngettext
 local T = require("ffi/util").template
+local util = require("util")
 
 local CloudStorage = Menu:extend{
     no_title = false,
@@ -227,15 +228,18 @@ function CloudStorage:downloadFile(item)
         })
     end
 
-    local function createTitle(filename_orig, filename, path) -- title for ButtonDialog
-        return T(_("Filename:\n%1\n\nDownload filename:\n%2\n\nDownload folder:\n%3"),
-            filename_orig, filename, BD.dirpath(path))
+    local function createTitle(filename_orig, filesize, filename, path) -- title for ButtonDialog
+        local filesize_str = filesize and util.getFriendlySize(filesize) or _("N/A")
+
+        return T(_("Filename:\n%1\n\nFile size:\n%2\n\nDownload filename:\n%3\n\nDownload folder:\n%4"),
+            filename_orig, filesize_str, filename, BD.dirpath(path))
     end
 
     local cs_settings = self:readSettings()
     local download_dir = cs_settings:readSetting("download_dir") or G_reader_settings:readSetting("lastdir")
     local filename_orig = item.text
     local filename = filename_orig
+    local filesize = item.filesize
 
     local buttons = {
         {
@@ -247,7 +251,7 @@ function CloudStorage:downloadFile(item)
                             self.cs_settings:saveSetting("download_dir", path)
                             self.cs_settings:flush()
                             download_dir = path
-                            self.download_dialog:setTitle(createTitle(filename_orig, filename, download_dir))
+                            self.download_dialog:setTitle(createTitle(filename_orig, filesize, filename, download_dir))
                         end,
                     }:chooseDir(download_dir)
                 end,
@@ -278,7 +282,7 @@ function CloudStorage:downloadFile(item)
                                             filename = filename_orig
                                         end
                                         UIManager:close(input_dialog)
-                                        self.download_dialog:setTitle(createTitle(filename_orig, filename, download_dir))
+                                        self.download_dialog:setTitle(createTitle(filename_orig, filesize, filename, download_dir))
                                     end,
                                 },
                             }
@@ -318,7 +322,7 @@ function CloudStorage:downloadFile(item)
     }
 
     self.download_dialog = ButtonDialog:new{
-        title = createTitle(filename_orig, filename, download_dir),
+        title = createTitle(filename_orig, filesize, filename, download_dir),
         buttons = buttons,
     }
     UIManager:show(self.download_dialog)
@@ -388,7 +392,6 @@ function CloudStorage:onMenuHold(item)
                     callback = function()
                         UIManager:close(cs_server_dialog)
                         self:editCloudServer(item)
-
                     end
                 },
                 {
diff --git a/frontend/apps/cloudstorage/webdavapi.lua b/frontend/apps/cloudstorage/webdavapi.lua
index dcb3c08de..3865d6163 100644
--- a/frontend/apps/cloudstorage/webdavapi.lua
+++ b/frontend/apps/cloudstorage/webdavapi.lua
@@ -67,7 +67,7 @@ function WebDavApi:listFolder(address, user, pass, folder_path, folder_mode)
     end
 
     local sink = {}
-    local data = [[<?xml version="1.0"?><a:propfind xmlns:a="DAV:"><a:prop><a:resourcetype/></a:prop></a:propfind>]]
+    local data = [[<?xml version="1.0"?><a:propfind xmlns:a="DAV:"><a:prop><a:resourcetype/><a:getcontentlength/></a:prop></a:propfind>]]
     socketutil:set_timeout()
     local request = {
         url      = webdav_url,
@@ -109,6 +109,9 @@ function WebDavApi:listFolder(address, user, pass, folder_path, folder_mode)
                                       item:find("<[^:]*:resourcetype></[^:]*:resourcetype>")
             local item_path = path .. "/" .. item_name
 
+            -- only available for files, not directories/collections
+            local item_filesize = item:match("<[^:]*:getcontentlength[^>]*>(%d+)</[^:]*:getcontentlength>")
+
             if item:find("<[^:]*:collection[^<]*/>") then
                 item_name = item_name .. "/"
                 if not is_current_dir then
@@ -124,6 +127,7 @@ function WebDavApi:listFolder(address, user, pass, folder_path, folder_mode)
                     text = item_name,
                     url = item_path,
                     type = "file",
+                    filesize = tonumber(item_filesize)
                 })
             end
         end
@@ -143,6 +147,8 @@ function WebDavApi:listFolder(address, user, pass, folder_path, folder_mode)
             text = files.text,
             url = files.url,
             type = files.type,
+            filesize = files.filesize or nil,
+            mandatory = util.getFriendlySize(files.filesize) or nil
         })
     end
     if folder_mode then