Made from obi (sash). The string is an obijime (sash cord). Size: Approximately Width 15cm x Height 23cm, Bottom 15cm x 4cm The length of the string can be adjusted using the obijime. The opening is open, but a magnetic clasp can be added for an extra 200 yen. Please comment if you would like one. I also have backpacks and tote bags for sale. Custom orders are also welcome. Thank you.