For small sizes, 4 1/2 -8, we use silver Washington and Barber quarters. We can also craft standing liberty quarters on request. For large sizes, apx 8 -14 we use Barber, Walking Liberty, Franklin and 1964 Kennedy half dollars. Barber half dollars are an additional cost. For extra large sizes we use silver dollars, sizes 14 - 19. We can make custom rings on request for certain types of coins or dates, ie: birth year, anniversary, ect. We also make "His and Her" ring sets. Please ask for a price quote. If we feel that we can make it we will try. Please note: We are now making rings with Silver Dollars.