I have several of the DE hones (≈ 1 6/8" x 2 3/8") and the size seems a bit small for a razor. I would reserve mine for emergency straight razor use maybe. One of them is a fairly fine grit.
About the smallest hone size that I use consistently (and comfortably) is 7/8" wide x 4 3/8" long. Those are the DMT hones in my avatar. I am becoming quite fond of the tan W4EE 8,000 mesh. It works, for me, as well or better than the D8EE. It's much lighter and handier to pack around.