As PaulS said, look for a small plate/sticker on the bottom front curb side corner. Also look for another sticker that has weight information on it. Later models have it on the driver side near the front on the upper section. I don't recall the VIN having model or length info. If you have the title for the trailer it may be on it. HiLo trailers lengths are from hitch ball to back of the bumper. Look in the brochures and they will give you the total lengths for various models. Our 2310H is 22'-10" long, if it was a 2009 model it would have been called a 2209T, same length.