Adjustable necklace construction

In an improved adjustable length necklace, including a single length of chain and first and second adjustment elements, each mounting an end of said chain and having resilient means bearing upon a segment of said chain adjacent an opposite end, the improvement comprising:

• said adjustment elements including first and second casing members, said first casing member including a main wall of generally planar trapezoidal configuration, a pair of converging side walls defining openings at each end thereof;
• said second casing member including a main wall, first and second converging side walls defining corresponding openings at each end thereof;
• said walls on said first and second casing members having cooperating latching means thereon including an elongated opening in each of one pair of walls and a resilient tongue on each of a second pair of walls, said tongues including a first offset portion and a second rectilinear portion lying in a plane substantially parallel to that of a respective wall;
• said first and second casing members being maintained in nested relation by the mutual engagement of said latching means;
• and a trapezoidally-shaped terminal block attached to each end of said chain, and maintained in position between said first and second casing members.