this if for a 1995 960

Would anyone know the inside diameter of the hoses used to connect the cooling system to the oil cooler under the engine? One of the hoses is leaking coolant, and I plan to replace it this weekend. Since the 960 is my only running car at the moment, I want to have all the necessary parts on hand before starting work. I don't have the option of draining the coolant, measuring the hose, then dashing off to the auto parts store for a replacement. I can use bulk hose to replace both, right? ( if one is bad the other must be soon to follow) My hope is that Volvo didn't do something like use molded hoses with different diameters at the ends....