I call these rings "Spark" because they seem to have an electricity about them....it's nearly impossible to feel anything but joyful when wearing one of these babies! I get multiple compliments every day I wear one, so sometimes I wear two! :) So comfortable, I usually forget I even have them on. Constructed using the highest quality Japanese Delica beads and Fireline thread. These are super sturdy, and will definitely survive if you forget to take them off when you wash your hands! But it's a good idea to try to take them off when showering or playing in the water. First, you don't want them to fall off, right? Second, why take chances? They should fit slightly snug when you first get them because they will loosen up ever-so-slightly with wear. Check out photos for sizes...I put them on a ring mandrel so you can see the exact size. Always size up if you are buying a wider ring. For example, I usually wear a 6 1/2, but if I am wearing a wide band ring I will go up to a 7 1/2 or even 8 if it's super wide!