Ok Ryan I dug out my info. on boot size on my 85 300sd I am speaking of the inner axle boot I have wrriten down that big side is (70mm-2.75" ) and small side (26mm-1.02") . The closest match I have found is speedi-boot part#03606 which is 75mm×24mm bolt together boot which I make fit and has worked fine for many yrs. I dont think I have had to replace the outer axle boot to this day yet so I have no sizes on that can.