USA Ring Sizer Measure Tool Gauge Plastic Finger Sizing Finder Reusable US 1-17 Size: US 1-17 These items are shipped WITHOUT a tracking number but still as USPS First Class LETTER or FLATS.Number you will receive is a reference number between USPS and Endicia (our shipping label company) to use for billing purposes. That means there is NO TRACKING information available for the shipment.