Best age to sex bantam Cochins?

[KikiDeAnime]

I have 2 chicks that are a few weeks old and I don't plan on posting photos until the correct age but I haven't had Cochins for a while so I kind of forgot when the best age to sex them is.
What age is best?

 

[ButtonHoarder]

With mine I could start to tell around 5 weeks if I’m remembering right.

 

[JedJackson]

6 weeks is the general time recommended in here but it can be sooner if you notice larger combs with red coloring, or later sometimes too.