property File.Size as Long
Retrieves the size of the file.

TypeDescription
Long A long expression that specifies the size of the file ( in bytes ). 
The Size property gets the size of the file in bytes. The Size property gets 0, for folder objects. The FullName property indicates the fully name of the file or directory. The Modified property specifies the date when the file was last written to, truncated, or overwritten. The Created property specifies the date when the file or directory was created. The Accessed property specifies the date when the file was last read from, written to, or for executable files, run.