The Bridesmaids usually follow the theme of the Bride by wearing a matching Tartan Sash (which also makes an ideal Bridesmaid's gift)

The Bride and Groom's mother's and other immediate family usually follow the theme of the Bride and Groom in their own way, with the invited guests wearing clothes of their choice - but all can join in the spirit by wearing a tartan sash or tie. The wedding invitations can indicate that Tartan is the theme of the wedding.