Picking out a groom’s wedding band is an incredibly important purchase, so take the time to make the process about him. “It’s never too early to start shopping, but in reality, three to six months before the big day allows for plenty of time to learn his preferences,” Schoenfeld says. In order to make sure the band is ready for the big day, be sure to purchase it at least two months before the wedding in case it needs to be resized or exchanged.