lowering the head of the ring to 7mm and increasing the arm width to 3.8mm

add Make Love Great Again engravings inside the band/Size 6

exchange price would be $652.8, so the price difference is $42.4 (652.8-610.4).  After adding a restocking fee of 15% of the total order price ($97.05 (647.02 * 15%)), you will need to pay a price difference of $139.45 (42.4+97.05).