You need this:
- Belt in dark blue (hardware store)
- tape measure
- scissors
- Möbeltacker
- upholstery nails
- hammer
And this is how it's done:
1) Cut the belt according to the chair width and depth. First staple sections longitudinally close to the chair. Weave the parts in the transverse direction through the other straps, creating a seat without gaps.
2) Tension the transverse ends of the straps tightly and also fix them with a furniture tacker.
3) Decorate the conclusion with the upholstery nails. The instructions for the stool can be found for free on the Internet at wunderweib.de/anleitungen.
Here are the instructions including pictures for download.