Serama: how to select breeding pair for small size offspring

[yuaan]

Hello all,
I am hoping to get some help andesk information from serama breeder.
I 5 months ago hatched some serama eggs from eBay. They turned out not too pure breed. I now want to breed them to get better and smaller sized serama. Below are the pic of my 2 roos and 3 hens.
Can anyone please tell who should I breed with what hen to get smaller size .
This is my first roo 5 months old he is slightly bigger than my 2nd roo. His posture looks better than other roosters too but the only concern is that is bigger than the other room.

This is my second roo much smaller than my first roo.

Below is my 1st hen biggest out of the rest 2 hen.

2nd hen medium size

3rd and the smallest hen

Please please help.

Thanks

 

[cavemanrich]

Choose the 2 smallest and pair them up. 5 month old chickens may still be slightly early to have them breed. .. Keep those 2 separate from the rest so you know which eggs to incubate.
WISHING YOU BEST.