New Gold Plated Crystal "M" Balloon Bubble Initial Necklace, price: $25
The chain is 16" + 2 " extension long. Chocker lenghts or just a little longer.
The letter M pendant is: 22mm h x 18mm w x 7 mm d.
...a distinctive hollow-out back patterned with a series of tiny cut-out hearts. While the front of the charm is pave-set with sparkling cubic zirconia to resemble a puffy balloon.