大小财产用于返回的大小，以字节为单位，指定的文件或文件夹。

语法
FileObject.Size
FolderObject.Size
 

例如File对象

<%
dim fs,f
set fs=Server.CreateObject("Scripting.FileSystemObject")
set f=fs.GetFile("c:test.asp")
Response.Write("The size of test.asp is: ")
Response.Write(f.Size & " bytes.")
set f=nothing
set fs=nothing
%>
Output:

The size of test.asp is: 10556 bytes.
获取文件夹的大小
<%
dim fs,fo
set fs=Server.CreateObject("Scripting.FileSystemObject")
set fo=fs.GetFolder("c:test")
Response.Write("The size of the folder test is: ")
Response.Write(fo.Size & " bytes.")
set fo=nothing
set fs=nothing
%>Output:The size of the folder test is: 123456 bytes.