that I can't delete a listing when it has an offer outstanding on it. The problem is it sold on ebay so crossing my fingers it doesn't sell again. I tried changing it to "not for sale" also, but it won't let me do that either.
Click on your Poshmark listing and click Edit. Change the size and click update, then you should be able to edit again to delete the listing, or mark as Not For Sale.
Very clever!! The offer timed out and I was able to delete it, but I will [try to] keep this in mind for the next time!
The first time I had this happen was when I was a Poshmark newbie. I had just sent offers on an item when it sold on Ebay. I panicked! Couldn't figure out what to do, so I "Googled" it and that came up. I tried it and it worked, so I wrote it out on a sticky note and put it on the wall by my computer! lol