I have heard of over-sized rings but I have never seen them used. Here is an entry from Deves Piston Rings:

" . . . Check the end gap of the compression rings by inserting them, one at a time, into the cylinder and squaring them to the cylinder wall by turning a piston upside down and pushing the ring down into the cylinder approximately one inch (with the top of the piston). Measure the end gap with a feeler gauge. Check this against the end gap spec chart at the back of the Deves Piston Ring catalog or the instruction sheet included in each set of rings. If the gaps are too small, the ends of the rings need to be filed. If the gaps are too large, you may have the wrong size rings, or your cylinder may be worn to the point that it needs to be bored and oversize pistons installed. But, if the cylinder is still within factory tolerances, it is possible to install oversize rings (.010"/ .025mm larger than the bore) and file the ends to the correct gap. Please call to check availability for your particular application. . . . "