Well in the very near future they will be even smaller! Yes i said smaller
To Take a look at the Picture of it an the Comments that goes with it check out the Link: b33
http://www.engadget.com/2012/06/01/new-smaller-sim-format-gets-standardized-shrinks-40-percent/
Smaller sim means more room to intergrate better hardware and a smoother device design..
Now of they can make extended batteries smaller... :-P. :-D
It is a good thing I have some nail length. Trying to avoid touching the gold contact plate is tough enough as it is. I am glad that there is a standard size now. However it does mean new SIM card adapters will be needed for some phones.