Agreeing with Pepper and GK here, if you have a sellier mou kelly, it is very special. In this thread,
http://forum.purseblog.com/hermes/question-re-kelly-mou-229703-4.html
you can read more about it, but do read to the end because there is some confusion. Style101 shows here mou sellier kelly, which does not look floppy, and S'mom shows here togo one, which has a definite relaxed slouch. Whether your bag is actually mou we cannot say without the squish test...but a sellier kelly will not fold unless it is mou, which is rare indeed! good luck, and that is a lovely bag!! IIRC these are the only sellier mou kelly bags we have had the pleasure to see!
Thank you CobaltBlue, after seeing those "mous", I doubt mine is...please see attached photos. There is absolutely no slouch in my Kelly when it is standing up...what do you ladies think?