This is a beauty collar made from new sarashi (a type of cotton cloth). Compared to beauty collars that are just the collar, this one has a front and back panel, making it less likely to slip, and the sarashi material is breathable. There is no "emon-nuki" (a feature to adjust the collar's nape). It can be used all season, not just for summer, and is perfect for wearing with a single-layer kimono to combat the heat. Attach a han-eri (collar lining) like you would with a juban (undergarment), and insert a collar core. Size Front panel: Approximately 66cm Back panel: Approximately 56cm Collar width: Approximately 5.6cm As this is a handmade item, please refrain from purchasing if you are looking for perfection or the quality of a mass-produced product. Thank you for your understanding. *Also, I am selling a version for those who want a round and generous nape. It has a relaxed neckline and is recommended for hot summers.