The acorn is a symbol of strength and potential. Acorns are also considered to be a lucky symbol, representing prosperity, youthfulness, power and spiritual growth.  

Acorn Keepsakes: Acorns are often used for baby keepsakes, and wedding gifts—as they are a meaningful way to tell the story of a new venture or stage that may grow into something significant and lasting. "From little things, big things grow". The acorn charm is 1/2" long and 1/4" wide.