12004 Approximately 390cm in length No side seams on the obi Material Mostly pure silk, but other materials may be mixed in. This is stated because they are sold as a set, so please understand before purchasing. As I am not a professional, I may not be able to answer questions about the product. Please refrain from purchasing if you are looking for a perfect item or are sensitive. I will respond quickly, politely, and with sincerity. Thank you.