The biggest tablet to come out of the Archos stable as of now measure 10.1 inches. However, the French company may be having plans of adding a 12 inch sized tablet to its line-up. Or perhaps they have had such plans in the past and have kept their options open. This is what some inquisitive exploration of the kernel source code by a XDA developers forum member letama has come up with which includes references to device names like Archos A70S2, A70H2, and A101XS and A120.
Now these have never been known before or has not been acknowledged before by Archos. However, going by the convention that Archos uses to name their devices such that Archos 101 refers to a tablet with a 10.1 inch sized display, the device named Archos A120 is being inferred to include a 12 inch sized display.
However, these are just speculations as of now. In fact, chances are that we might never get to see such devices though at the same time, who knows we might well get to see a working version of the same some time down the road.