This is an above knee prosthesis with a "Total Knee" by Ossur.  I took photos of the various parts and I hope that will help.  I'm happy to measure or look at any parts more closely if you have questions.   A few of the photos have a measuring tape in the photo to help guage size.  The top of the socket Flexible liner has a diameter of approx  10".  It funnels down to 7" at the upper leg portion and then down to about 5" at the lower portion of the socket.  There's a silicone gel liner with pull strap made by  Medi-Liner.  I do not see any size markings on it.  The knee seems to function correctly.  It stays locked with heel pressure and the as I move forward toward the forefoot, it gives way and bends.  I did not attempt to take the rubber foot off the prosthetic foot frame, but I can with instruction if needed.