Yes it’s old methinks, but still fun. The Dollar Note Ring. Impress your fiancee by folding them a 20, eh?
As with all these instructions, try to start with a relatively clean, crisp bill. It will make the process easier. All folds should be sharply creased. It helps to go over the fold with a fingernail on a flat, hard surface. For your first attempt, use a 1 dollar bill, as the description is based on the features of the reverse face of that bill. After you’ve done a couple you can try out different denominations.