Medium Silver with Bright Pink Crystals Twist Face
Sold with a medium base 
26mm - size of a nickel
This was sold with the medium "Link Locket Base" that was used with the Over-The-Heart Chain, or the Link Locket Bracelet, or the newer Medium Bangle Locket
Although never sold with a Medium Twist Base, it can be used on any Medium Base.
Base options:
LK4006 - Medium Silver Twist Locket Base
LK3008 - Medium Silver Wrap Twist Locket Base
LK3041 - Medium Silver Phone Ring Locket Base
LK3038 - Medium Silver Bangle/Link Locket/Over-The-Heart Chain Locket Base