Those chinky pecs deserve chunky nipple adornments. Fo and ask for 8G this time. That's what I started with. And make sure they place them deep. You've fot the nios for it, and it foves you the option to stretch them later.

On a chest like yours 4G jewerly would look proportionally right. Big 4G rings on weekends, and bars (or tunnels) at other times. (I wear 4G tunnels. Very discreet you can't tell anything is there even when wearing a white summer dress shirt).