I measured my hens and they all seem to be around 5 inchs wide and about 7-8 inchs from head to chest. I made a frame kinda of thing and tried it out. It was 6 inches by 6 inches. My females fit snug but males couldn't get in.
Thank youIt was actually a change in departments with additional functions
lol. I'm too old to learn new things, lol. I will try to measure some today. My girls always run into the pen to get away from the boys so I thought I'd fix it so they couldn't come in after them.