it refers to a phenomenon (a.k.a DSS - diamond shrinkage syndrome) whereby you get a diamond or band of diamonds and at first all is well and it satisfies. however after getting used to it, usually in just a short time, it starts to appear smaller and you find yourself thinking ''gee, should i have gone with larger?'' or ''i wish it was a little bigger!'' the diamond(s) doesn''t actually shrink, but your perception is altered such that it looks smaller to your eye than when you first got it.