This is a beautiful vintage set, well matched in sparkling swiss topaz blue, the color of the sky on a clear day.  The ring has hearts on both sides, holding the prongs for the 5 faceted swiss blue topaz gemstones which is a lovely and unique detail to this ring and is a size 6.5.  It is marked: Thailand, CNA, 925.  The rectangular pendant is approx 3/4" long with a split bail and hangs on an 18" sterling box chain  marked: 925 Italy AGI.   The earrings are bezel set with built in french levers.  The total earring is approx 3/4" long and marked 925, S. The marvelous thing about this set is the swiss blue topaz is all very well matched even though they came from different places.  The total weight for this set is 10.01g.   This is the December birthstone.