Yes. We can help you with a picture. You're looking for male specific feathering such as long and pointed hackle feathers (neck feathers), long and pointed saddle feathers (base of tail) and long, curved sickle feathers. All of those are for males above 12 weeks old, on average. Males younger and older than that age are also distinguishable by large, red combs and wattles. Males over a year old also have spurs.
Big red comb, Pointed hackle, & Saddle feathers. Sickle feathers on the tail. (Fancy Tail Feathers) Do you have a picture of your bird in question?
Significant comb and wattle growth 6 weeks or younger almost always indicate cockerels. Also like the others have said male specific saddle feathers generally grow in around 12 to 15 weeks.