Got through to USPS (800-610-8734)

The representative I spoke to was well aware of the free "ground advantage" boxes and mailers. All the following come in packs of 25. I was able to order 75 of each box and 100 of the mailers. If you need more, you can, that's just how much I wanted to start off with.

Box 1: 12 x 12 x 8.5

Box 2: 14 x 7 x 5

Poly Padded Bubble Bag: 12.5 x 9.5

Paper Padded: 14.5 x 20,5

Polybag: 14 x 17

I was told it would take 7-10 days to arrive.

Of course, they will ask you for your Poshmark closet name. Hope this helps! I was hung up on about 10 times, and finally on hold for about 30 minutes, and had a very helpful and pleasant representative.

And according to the following link on usps website, ground advantage is eligible for free pickup

https://faq.usps.com/s/article/What-is-Package-Pickup#eligibility

After calls dropped dozens of times I finally got through to a postal worker and she admitted that Posh sellers have been blowing up their lines today and they had NO CLUE of the update!

Poshmark has promised the following (I highlighted the important bits) https://blog.poshmark.com/ :

Poshmark has partnered with USPS to provide complimentary Ground Advantage shipping supplies exclusively for Poshmark sellers. Packaging options include a variety of polymailers, padded mailers, and boxes*.* 
To order your packaging supplies, please call 800-610-8734. Please note that you will need to provide your closet name to USPS to confirm you are a Poshmark seller.

Rest assured, USPS is prepared for this transition and ready to support requests from our community.

I particularly love the last line about USPS being prepared for this (REST ASSURED - ha!)!

I found out that the USPS customer service reps have an internal chat group where they can reach out to each other to help with information about things they are getting calls on and the supervisors and team were all in the dark on this.

Call lines are open M-F 7am - 11pm (1-800-610-8734). Lets help each other out and report back if anyone has any success getting the free packaging Poshmark is promising. Otherwise, this means the discounted shipping makes selling MORE EXPENSIVE because we are now providing shipping materials from our own pockets.

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10:15pm EST Update - Finally got through and the phone system seems to have been fixed to not drop calls since the prompts seemed to be different. The rep said they have been overloaded by Posh sellers but they are working through to get to everyone quickly.

Supplies options includes different polymailers, bubble mailers and boxes. Limited selection but its better than nothing.

I asked what they do with our closet info and she said they are supposed to look us up to verify that we have a closet.

I said that the Posh community is generally really great and that I hoped everyone was being nice and patient with them and she said yes, most were lovely. SOOOO ---- lets represent our community well and let them know how appreciative we are of what they do to support us in our sales!

Hi, I've been selling several years but am fairly new to Poshmark. I made my first Poshmark sale last week and this week made my second one. When I shipped my first sale, I had no problem placing it in a priority flat rate mailing box and getting it shipped out with no issues on my end or for the buyer. However, today I tried to ship out my second sale, in the same way and in the same flat rate mailing box I used last week, and had problems. I spoke to a different clerk at the same post office and they wouldn't accept the box and told me I couldn't use flat rate boxes unless I wanted to pay the full $17 shipping charge. I tried to say that the shipping label says at the bottom that I can use any type of priority box, including flat rate, but the clerk cut me off and basically said Poshmark doesn't know what they are talking about because they don't understand how the post office works. So I left and drove 15 minutes to another post office who accepted my package in the flat rate box without any question.

Am I missing something here? My understanding was I could use any priority box as long as it isn't express, which this was not. I'd already shipped one item in the same box no problem, but this clerk was adamant that I'm wrong and kept interrupting me to say so. So any help on clarifying what I can use and what I can't would be super helpful, thank you!