We oriented the Large Sterling Silver 8 Pointed Star Necklace (also known as LeMoyne Star) 'on-point'.  You'll find some history that I found on this beautiful design along with the matching Earrings on another page, here's a link to it.

The outer edges of this pendant measure 3/4" square.  Another measurement that may be helpful is the height or 1 1/8" top to bottom.

The large necklace comes with a quality 20" sterling silver snake chain, but if you already have a chain you prefer it is available just as the Pendant for $30 less.  The small necklace has an 18" sterling rope chain.