Have you tried emailing Dalbello or speaking with them on the phone? Some of their boots already have intuition liners in them, so they would likely have a really good Idea of what sized liner you would need to put in your boots. Are your Rampage's just normal Rampage's or Rampage I.D.'s? I believe if it's the I.D.'s then they already have intuition liners, but I could be wrong.