Before you purchase a ring, you’ll need to decide on the size you want. Your ring should be tight enough that it will not come off your finger inadvertently, but not so tight as to be uncomfortable. For most people, there are several ring sizes between uncomfortably tight at one extreme, and obviously too loose at the other. This means that there is some degree of subjectivity to the question of what is the right size. Some people simply liking to wear rings tighter than others. For this reason, your jeweller can advise you, but ultimately only you can say what size feels best to you.