Using these handcuffs is a breeze. First, open the buckle closures to adjust the size according to your wrist circumference. Make sure it's comfortable but not too loose. The cuffs are designed to fit circumferences between 5.9” and 8.25” (15 - 21cm). You can use them on their own or pair them with a clip - able leash or rope (which you'll need to buy separately). When you're done, close the buckle closures gently. As for maintenance, keep them in a dry place away from direct sunlight. Avoid getting them wet, as this can damage the vegan leather. If they get dirty, you can use a soft, dry cloth to wipe them clean. Don't use any harsh chemicals on them. Enjoy exploring new experiences with these handcuffs, but always use them responsibly.