Ohmyheart
Songster
They look like hens to me. Roosters get very long thin feathers around their neck, almost like a mane.
Talking with the breeder I got my buckeyes from, they're rather difficult to sex.
Ethel is the only one that may be questionable from what I can see. Her waddles seem a little larger than the others.
At 6 weeks old you can attempt vent sexing. I'm sure there's plenty of you tube videos or explanations online on how to do this.
I think Ethel's waddles are a finger tip