I purchased this last Christmas but only tried it on and never used it. The following information from the purchase source is quoted below. Please refer to it. ◎ Neck circumference: Approximately 30cm 　 Neck length: Approximately 9cm There may be some slight errors. Please understand. ◎ Materials ・ Double gauze on both sides + Dommett core used (The gauze has been pre-washed. There is almost no worry of shrinkage during washing.) ・ Plastic snap buttons used ◎ Washing instructions ・ Machine washable. (We recommend using a laundry net.) ・ If you are concerned about wrinkles, please iron it. (Please iron, avoiding the plastic snaps.) Please hold the base of the button and gently attach and detach it. ━━━━━━━━━━━━━━━━━ Simple packaging, using recycled bags Compression bags may be used. Please refrain from purchasing if you are concerned about wrinkles. Rakuraku Mercari and Yuuyu Mercari may be changed at our convenience. ━━━━━━━━━━━━━━━━━ When negotiating a price reduction, please let us know your desired amount. We will then consult with you. If you have any concerns, please ask in advance. Feel free to comment＾＾ No smokers, no pets.