Matx (micro atx) is typified by a square board that is 9.6" (244mm) x 9.6"
Matx will be the smallest board you will ever get a socket 1336 on and for that platform I would suggest the baby classified (newegg link)
for 1156, you could easily go Matx (I don't have any suggestions for that)
but, in the news a few weeks ago a board in development by dfi was posted that is a mini-itx form factor which is 6.7" (170mm) square with a socket 1156.
Matx will be the smallest board you will ever get a socket 1336 on and for that platform I would suggest the baby classified (newegg link)
for 1156, you could easily go Matx (I don't have any suggestions for that)
but, in the news a few weeks ago a board in development by dfi was posted that is a mini-itx form factor which is 6.7" (170mm) square with a socket 1156.