We have 3 retro buckles / scarf accessory, all vintage more than likely dating somewhere between the 1960's - 1980's.  They are all plastic.  Navy, black and clear.  They all have a decorative mold.  The clear one is about 2 1/8" x 2 1/4", the round navy one is about 2 1/8" across the center and the black one is about 2 1/4" x 1 3/4".  They all are about 1 1/4" on the center bar in l.  The clear one may be glass.....I'm not certain.  They are all in good condition.