*pentagonIn my opinion the female head shape is narrow and will fit between two parallel lines. The tom's head shape is more of a pentagram, broader at the front.
Toms will develop their caruncles sooner and bigger than a hen's caruncles. These are the bumps near the base of the throat below the wattle.
At 2 months old toms can grow their wattle before the hens do but the hens will catch up quickly.
I believe you are thinking of the snood which on adult toms can swell very big and hang well below the end of the beak. I have not noticed that the size of the snood on young poults means anything.
Wow, very interesting!
Of my broad-breasted young turkeys, I thought we had three hens and two toms, until a “hen” gobbled!