Purity ring

so I have a purity ring and I am talking to this guy. It is my first time having the potential of being in a serious relationship. I have no idea when it's the right time to tell him about my ring. I don't want it to be too early, but I also don't want it to be too late and we start dating and I tell him, then he could break up with me. I have send him bra pics and stuff, I'm not a total prude lmao. I don't want to lead him on and not sure if I should tell him or wait a little more.