You’ll need a heart-shaped locket charm that’s just as special as the picture, date, note, or other memento it carries. Go the understated route with a vintage sterling silver heart locket. For an extra-personal touch, work with a seller on Etsy who can engrave a quote or tiny message, or customize a heart pendant choker with a birthstone. Whichever style you choose, make sure you tuck a precious picture or love note inside.
One last thing: You’ll need to know the size and type of chain you want. Generally, the chain’s thickness should be in proportion to the neck. For example, a dainty chain is an elegant choice for a long, graceful neck. The chain should also harmonize with your locket. Many heart-shaped lockets on Etsy come with gold or silver chains.