My wedding shawl. Yards of "print o' the wave" lace knitting in ivory alpaca.
I wore it at my wedding, and at a family wedding. And now I've delicately pinned it out for a friend, who is considering wearing it for her own wedding (something borrowed).
Pinning it out -- hundreds of little points in a row -- is a meditative act. I don't have reason to do it often, maybe just once a year. But whenever I do, it makes me happy.