Country Boy replied: "I'm not sure if you're referring to the physical length, width and diameter or it's filtration capacity in microns. First, any auto parts store can advise you of the exact factory replacement replacement physical size for your application. They also can cross reference physical size for extended lengths if there is room if that's what you're asking. It's important to remember not to change arbitrarily the sealing gasket diameter or weather or not if it has an anti-drain back valve. If you've ever read or been interested in filtration capturing ability it can get confusing. I'm sure you've heard of the term: Micron filtering capacity. 1 micron = .000039 thousandths of one inch. In most automotive oil filter applications companies will actually advertise their micron filtration capacity. In other words: It's ability to capture a given micron size. In this instance "Moor's Law" is not always better. On the surface you'd think a filter that captured the smallest size dirt particles it would be better. However, in automotive applications it's been determined that an oil filter that captures a particle size of 20 - 25 microns is adequate. It's been found that filtering below 20 microns will soon open the by-pass valve inside the filter and you get no filtration at all. This could happen well within 3,000 miles. I'll admit to being an old woman when it comes to oil filter selection and physical size where "Moor's Law" is better What ever the application, larger filtration * surface area is always better. My "thing" is stick in the largest physical sized filter that you conviently can install which also meets the internal valving as required by the manufacturer. A word to the wise. Don't be fooled by the physical size of the oil filter. Look inside and make sure the filtering media goes clear to the bottom of the can. If possible find out from the manufacturer how many square inches of filtering media there is in a given filter."