Hat size: 48-50 cm Neck warmer: Approximately 11 cm (height) x 50 cm (width). Both are the type that fastens with snap buttons. The neck warmer is written as suitable for ages 1-5 years old. Since these are used items, there is some wear and tear, but I think they can still be used for everyday wear. I think it would be cute to wear them as a set. Please refrain from purchasing if you are concerned, as these items have been stored by a private individual. Thank you. Anpanman Hat & Neck Warmer