Yes, band thickness can affect your ring size. The more a ring covers your finger, the tighter it will fit. Stacking many band types, such as with a wedding ring set, can also increase the ring size you’ll need. We recommend measuring your ring size with a sizer that’s close to the thickness of the ring you'll be wearing.ze to ensure a comfortable fit for a few days. We'll even refund the cost once you place your final order!