The Ring Warming is a short ritual, that can be done a number of ways. It involves those close to the Bride and Groom offering their best wishes/prayers for the soon to be married couple. This can be used at a Renewal of Wedding vows as well.
a) The Best Man can invite each of the guests to warm the rings as they come in for the ceremony
b) The family of the couple and the wedding party can warm the rings during the ceremony
c) If there are under 20 guests each of them can be invited to warm the rings (all depends upon how much time you want to take for the ritual)
Officiant: I invite _________ and _______’s family to join me in a ring warming. Hold the wedding rings in your hands for a moment, warm them with your love and make a silent wish for the couple, one that will carry them into a bright and lasting marriage. When these rings come back to _________ and __________, they will contain–in their precocious metal, that which is more precious and priceless–your love, hope and pledge of support for their union.