Silver ratio is defined by 1+ root 2, which is approximately 2.414 (4sf).An object is considered to have silver ratio if(2 times the smaller quantity+the larger quantity/smaller quantity)divided by (the smaller quantity/the larger quantity) gives 2.414...We might not realise but we are using silver ratio everyday!

You can find the silver ratio in paper size, japanese buildings that are still existent and many landmarks such as The Octagon, and Little Hagia Sophia.