Female, in flower.
Those calx's are about to swell up, you are close to harvest.
Congratulations!

They are small because they were planted too late in the season.
Cannabis is photoperiodic.
When it "sees" more than 12 hours of darkness it feels winter coming and goes into flower.
You need to start in the early spring to grow tall trees.

Might be small, but they look good.

Aloha,
Weezard