Update for use with the leupold mark ar mod 1 3x9 scope - Butler Creek Blizzard See Thru Spotting Scope Covers

The #5 scope covers are what you want for the eye piece. They are two big (the #4 is to small), but after three wraps of electrical tape they fit like a champ. The Leupold 6x18 Mark AR scope also has the same eye piece diameter (not objective, just eye piece) so the #5 size is also the one you want for the eye piece of that scope as well.

I personally am not bothered one bit that this product didn't fit perfectly, it was $8 compared to the $80 that Leupold wants for their eyepiece covers and I have no reason not to expect a long life of use out of it.