The Flag!
The flag measures 80 x 80 m, making it the largest hanging Swiss flag in the world. It is to be mounted on the rock of the Säntis by approximately 20 rope access technicians and ceremoniously unfurled on July 31. The 155cm-wide fabric panels were assembled in the studio of Heimgartner Fahnen AG and sewn together to make the 6400m2 flag. The 4330 linear meters of fabric and about 3500 linear meters of reinforcing straps were sewn together with a total of about 60,000 m of thread, which brings the 80 x 80 m flag, after approximately 600 man hours, to a total weight of about 700 kg

Source: Swiss flag on the Säntis (saentisbahn.ch)