The actual measurements from the web sites are given below, but I am interested in learning what your "subjective" comparison is for concealability/carryabilty from those who have handled both.  Sometimes the measurements don't tell the whole story...

M&P9c
Overall Length: 6.7"
Overall Height: 4.3"
Width: 1.2"
Weight Empty (No Mag): 21.7 oz.

G26
Overall Length: 6.29".
Overall Height: 4.17"
Width: 1.18"
Weight Empty: 19.75 oz

I have a MP9c, my buddy has a glock 27 (same size as 26). There's little to no difference in size or weight. We both use don Hume 715 iwb holsters, and can tell no difference when we swap carry rigs.  I just prefer the grip of the MP over the glock.  I'll do my best to get a comparison picture for you tomorrow.

As you posted on the dimensions, the M&P9c falls in b/w the 26 and the 19.

Still very concealable––preference to the 9c for ergonomics.

Bump for crappy iPhone pics:

Wow...thanks a lot!!  That is a fantastic comparison!  Thanks again.