A while ago I knitted a pinkish square for the Swiss league against cancer. It was supposed to become a part of a huge big solidarity ribbon which would be revealed in October. People were asked to send in also photos of their work in progress which can be seen here. Obviously they received so many squares (almost 20 000!), that it was not just enough for the ribbon, but also a bunch of blankets which will go to relief organizations.
The ribbon is 12 m high and was presented on October 1st on a public square in Bern. Here on their website you can see lots of photos of that event. Looks like a damn big pink ribbon!