These are replacement sleeves for a pre-made long undergarment (nagajuban). Made from wash-and-stretched polyester mon-ro (crepe) nagajuban fabric. Although it's polyester, the material doesn't cling to your arms even when you sweat. I was able to procure the product I was looking for as a pre-made item. This is a re-listing after wash-and-stretch and re-sewing. Kimono Dimensions (slightly shorter) Sleeve length: 45cm (1 shaku 2 sun 5 bu in kujira-shaku) Sleeve width: 32.5cm (8 sun 5 bu in kujira-shaku). Since the body fabric remains, please consult with me if you would like to change the sleeve length or width. Please attach these to the sleeves of your existing hanjuban (half undergarment) or kimono. You can also attach them to the usotsuki hanjuban (false undergarment) currently listed. If you purchase a hanjuban and replacement sleeves together, I will attach the replacement sleeves (using basting stitches) if you wish. Since there are many requests from those who use Kiraku and other undergarments, I offer free Velcro attachment. After purchase, please let me know the dimensions of your kimono's shoulder width, sleeve length, and sleeve width, as well as any requests for Velcro, etc. If you have any requests or questions, please feel free to comment.