This original Apollo 11 medal measures approx. 1 1/2" and has a reeded edge.  It apparently is made of nickel and weighs approx. 21 grams.  It is in very good condition and would benefit from a good polishing which I'll leave up to you.  Comes in its original plastic case with blue cardboard insert, although the edge and clasp has sustained some damage but it's still functional.  Thanks for looking at this auction.