You will need
Variety of cloth/fabric ribbons/thin scarf
1. Take off the arm strap from your watch.
2. Take out the pins from strap and put them back into watch socket.
3. Now, put your ribbon or thin scarf through the pins and pull it.
4. Make sure, lengths of fabric are equal on each side of the watch.
Lastly, wrap this gorgeous designer watch around your arm
In case of ribbon strap, use Velcro to tie both the ends.
You can use waste denim fabric to make a watch strap.
It's an unique idea to use an inch tape as your watch belt.