For example, I have an heirloom necklace with a chain width of about 1mm and a cross pendant about 1in tall. The length of the chain goes down to the middle of my chest. Also, does make a difference if I wear it inside or outside my shirt?
Well honestly.. I see men and woman where I work who wear gold chain necklaces... it's just a fashion statement if you know how to dress up and make your accessory (gold necklace) look good it just adds onto your appearance but you gotta know what to wear and stuff.
Just be a nice person, dress up nicely, and if you wanna wear a gold chain or a gold necklace go for it!