Well, according to your description, you should choose 18K platinum (that is, platinum with 75% pure gold and 25% other metals is cheaper than pure gold, silvery white, high hardness, bright and difficult to deform).
In this case, it is generally 350-450 grams, depending on the brand and style. Generally, a male ring is mostly between 2 2- 10/0g.
Single with a tail finger!
Go to Caibai Mall to buy it ~