The circle of this case is 70 mm or 2.756 inches.  It holds one North American arms cylinder for the conversion models.  I designed this were it would hold the shells in the cylinder while you carried it in your pocket.   I will also list a belt version.  Made from grade A Herman Oak veg tan leather and tooled.   Stitching is double bonded nylon 277.  Color shown is Mahogany..  Black, Brown, Red, and tan are also options.  If you want your initials added please leave them or state none.