Whenever you are garment sewing start with a full bobbin. Resist the temptation to start with a partially wound bobbin unless you are making a minor repair. Nothing is worse than having to stop midway through a project to wind a bobbin that could have easily been wound beforehand. If you are making more than one garment as in a suit, consider winding two bobbins. You won't be sorry. If you don't use the second bobbin you will already have a fully wound one for your next project in the same color.