AVIREX Aviator Collar Navy S size Size is S size. Width: 1cm Neck circumference guideline: 16-24cm Applicable weight guideline: up to 4kg (From the tag notation) This item is unused, but since the specific storage period is unknown, I have set it to "near unused" as I cannot guarantee it is in new condition. I have inspected the item before listing and will describe any points of concern. However, if there are any oversights, please contact me and I will address them. This is a personal item stored at home, so please understand the above before purchasing.