How do you store your watches in the bank safe?

[DolphinV8]

I live in a city where a safe deposit box is extremely hard to get, and I could only find a 2"x5" at most. I tried to fit a small Oakley watch vault in there, and it's a tad too tall for the inner box. I guess the only way to do it is to lay all of my watches flat in there, but then what's the best way to protect the watches from hitting or rolling each other? TIA.