I get my colored spiral bands here : www.cutlersupply.com
I use sz 12 on all my hens except the smaller ones. I have Australorps, BR's, BLRW's, EE's,
I use sz 14 on my roosters - Australorps, Orpingtons, SLW's
I designate a color each year, that way I know how old my birds are. If I have the same breed from 2 different sources, each source gets its own color and the bird still gets the color of the year too.
Hey thanks for mentioning cutlersupply. I had never heard of them but they stock almost everything!!