where is text resize icons for 2013

I am building a ribbon menu comparable to what I has with 2007. One feature I used A LOT with the old release was the "text resizes" icons. This was the little pair of 'A's --press the large one to increase the size of the selection--press the small one to reduce. I cannot find these on the "Choose Commands From" of the ribbon "customize the ribbon" feature.  Can anyone tell me how to add this feature to my ribbon?

thanks

Fritz