Here is a model of the type 21 frigate F185, HMS Avenger. Modelled  in resin and recently assembled. 

She was 3250 tons, 384ft or 117m and armed with 4.5inch gun, Exocet missiles and torpedoes.  She also carried a Wasp helicopter. Model length is 108mms or 4 inches  Cat ref N55-185 X