This cloth strap material is 1/8" wide x .010" thick and good for most all 35mm cameras with cloth curtains. Commonly referred to as shutter curtain tape, however, it has no sticky backing like conventional tape.
30cm / 1 foot.
If you need it longer, you can order 2 and get one piece of 60 cm, order 3 and you get one piece of 90 cm and so on.