Hahaha...just a silly follow up...

Module size: 109 bytes...

Option Explicit
Public Sub Main()
    Dim x as Integer
    x = 1
End Sub

Module size: 113 bytes...

Option Explicit
Public Sub Main()
    Dim x as Integer
    Let x = 1
End Sub

Looks like the "Let" statement and the space after it take up 4 bytes of disk space.