Thank you for viewing. This is a free-size付け襟 (detachable collar). The size is suitable for those with a height of 100cm to 160cm. The neck circumference is roomy, so adults can wear it without issue, up to around 160cm. I think it would be cute paired with your light blue or white cardigans, dresses, or pajamas♪ ※Gowns & dresses for 80cm children are available. If you are interested, please contact me in the comment section.