When ordering a custom collar be sure to provide specific details you are looking for. Please include pets age if you are ordering for a young pet the collar will be made to grow as much as possible for the pet. All collars will be made to be adjusted smaller and larger than measurements provided to give the pet room for weight fluctuations. The easiest way to endure the correct measurements is to use a collar that already fits your pet and lay it flat to measure it, be sure not to include the part of the buckle that goes inside the other end of the buckle. If you don't have a collar currently that fits and a sewing measuring tape is not available using a ribbon or string should work as well. Please also include if the collar needs to be made to break-away for small dogs or cats to prevent choking hazards.