These cards require cutting along a fold, or making doubles to sandwich cord between.
If planning to mail the card, measure the envelope first and size the card accordingly (usually about 1/4 inch smaller all around). For the cleanest results, cut the paper with a craft knife on a self-healing mat (cut straight lines along a ruler). Some cards need the additional backing to conceal cuts or add weight; create a border by cutting the back piece slightly larger than the base, and layer patterned and solid papers.
Resources: Essentials paper pad, 12" by 12", in Neutral, by Martha Stewart Crafts; from michaels.com. Wood-grain paper, 20" by 26", in Pickled Maple; nycentralart.com. Fine metallic twist cord (#00329), 3mm, in Gold; organdy ribbon (02103001), in White, 3mm; mjtrim.com.