Getting married is quite expensive, therefore one of the best would be "monetary gift". Putting it in a card as money insert will be presentable enough and it can even serve as a souvenir from you to the newlyweds. Getting a good card that suits the couple will also give a higher value to whatever amount you'll give. It's not really how much you give, but how much effort you gave to attend and be part of the event. Gifts are somehow the ethical way of thanking and giving blessings to the newlyweds.
Getting married is quite expensive, therefore one of the best would be "monetary gift". Putting it in a card as money insert will be presentable enough and it can even serve as a souvenir from you to the newlyweds. Getting a good card that suits the couple will also give a higher value to whatever amount you'll give. It's not really how much you give, but how much effort you gave to attend and be part of the event. Gifts are somehow the ethical way of thanking and giving blessings to the newlyweds. 
