Recommended Ring Sizes (from AACC Website)
Individual breeders may find it convenient to use sizes one larger or smaller than the ones we have recommended, especially those marked with a *. Sizes K to Y available in stainless steel (closed, year dated) in addition to closed aluminum. Split plastics sizes 3FB and larger must be special ordered and cannot be numbered or coded. Size lists for birds of prey, geese, waterfowl and poultry, and doves & pigeons available upon request.