The tree of life has many meanings - a symbol of a fresh start on life, positive energy, good health & a bright future; a symbol of immortality; a tree grows old, yet it bears seeds that contain its very essence & in this way, the tree becomes immortal; a symbol of growth and strength.
Here is a link that gives heaps of information on all forms of understanding of this wonderful symbol!
https://www.celtic-weddingrings.com/tree-of-life-meaning
This charm comes with a kind of wavy shaped large jumpring on the top, with a threading hole measuring abut 7mm. If you want to convert the charms to a pair of earrings, you could just remove it and use a smaller ring.
Measurements: about 14mm wide, 21mm long, 1.5mm thick, hole: 7mm.
Quantity per pack: 2 charms