With over ten years of experience making custom hats, we at Russian Legacy are positive that the most important factor in buying a hat is the size. If a customer does not already know it, we always suggest using services of a local professional. In case this is not possible, a tape measure could be used. Wrap it snugly around the head just above eyebrows and ears. Use our chart to convert the measurement to a hat size or simply mention the result in inches or centimeters to your preferred furrier.