The pendant is 2 inches tall and 1/2 inch wide, comes with a black cord. 
 
Magical properties of jasper:
Protects against negativity and helps one to be grounded to the stabilizing energies of the Earth
Balances the physical, emotional, and intellectual bodies with the etheric energies
Stabilizes the aura, providing for a cleansing effect to smooth dysfunctional energies and to eliminate negativity 
Unites your energy field of the physical and the ethereal in order to balance the form and to direct you toward the goal
 
Reference: Love is in the Earth: A kaleidoscope of crystals by Melody