Ring settings have always been a "problem child" in that we can't always get exact finger sizes due to mold shrinkage. The only way we can eliminate that problem is to order a custom finger size. When you make your selection for stone size, metal type and/or finger size and the system tells you that your selections are not available, it means that you will need to order a custom size and pay the manufacturer's sizing fee or choose another ring setting. Custom sizes refers to finger sizes only. We cannot obtain a setting in a custom stone size. Please allow 10 to 14 days for shipping of custom size rings.