Having your child(ren) meet your boyfriend

I divorced my husband over a year ago and have finally just started dating again.
I met a wonderful guy but am wondering what is an acceptable amount of time before he meets my boys?
My husband is not in the boys lives and they tend to bond to male figures deeply because of it (family members etc), so I'm wary to let them meet my new guy for fear it doesn't work out and they get crushed.

3 months, 6? A year?
This is all so new to me. And a bit overwhelming.

I always felt like by 6 months into it I basically "knew" if it was going to last or if we weren't going to work out, so I think 6 months minimum is a good rule.

I'm married to my children's father so I don't have any experience with this but ive always felt this way about the 6 month mark in a relationship so that arms like a good time to evaluate things. Either it's going well and you think it'll last so you introduce them, or you know there are issues and you should really wait, or it's obvious there is too much wrong in the relationship and you end it.

I wanted to wait 3 months but we ran into my SO at walmart so that was their accidental first meeting. We have been together for almost two and a half years now so I guess it turned out well. Normally it would not have happened that way. The guy I dated before SO was a close friend so he already knew LO but he was a baby then so he does not remember him. The only guy LO has ever seen me date has been my SO.

my son met my SO after about like 1 month (horrible i know) but i just knew he was the one and now 4 years later hes still here and my son calls him daddy cuz he was very lil when they met so hes all he knows!

Thanks for the replies ladies. I think I'll play it by ear, but won't consider anything under 3-4 months.