Im looking to get new rear Douglas aluminum rims. I have new rear tires that are stock size. What size rim will I need to maintain stock size?

That I know of the only "Stock" size front or rear wheels are Genuine Honda OEM. The Douglas rears are 1 inch wider than stock and the fronts are 1 inch offset out more than stock. I had Douglas rears on 1 of mine and took them off because I didn't like how close the tire was to the shock. It didn't rub but was close. the 10" width of the stock rear wheel is perfect for me.