So I am wanting to create a headphone stand that balances of the edge of something, and need to calculate a counter weight, but can't find anything in the way of weight for materials. After a cursory check on the internet (all of five minutes), I know that a pair of closed headphones probably weighs under 400g (If you have an example of something heavier, then could you let me know, please?). This means I need to have a counter wight of weight * distance = 500g * 5cm. I haven't found anything which specifies material weight. The closest think I found was this thread, but it links to a page which I can't find anything on wieght on. Does anyone have any ideas?