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📦 Poshmark’s New Shipping Rates: What You Need to Know About USPS Ground Advantage Packaging

Poshmark has officially rolled out a major shipping update—and it’s a win for resellers. As of September 12, 2025, the platform has transitioned from USPS Priority Mail to USPS Ground Advantage. This transition brings the flat-rate shipping fee down to $6. That’s the lowest it’s been in years, and it’s a game-changer for bundle sellers and heavier items.
But with this change comes a packaging shift. If you’ve been relying on free Priority Mail supplies, it’s time to pivot. Here’s everything you need to know to stay compliant and keep your workflow smooth.
💰 What’s Changing with Poshmark Shipping
- New Rate: $6.49 flat for packages up to 5 lbs
- New Service: USPS Ground Advantage (2–5 business days delivery)
- Packaging Rules: USPS Priority Mail boxes and envelopes will no longer be accepted after October 12, 2025. Using them will result in a $5 USPS fee charged to the buyer.
📦 How to Get Free USPS Ground Advantage Packaging
Poshmark has partnered with USPS to offer exclusive free packaging for sellers. Available supplies include:
- Polymailers
- Padded mailers
- Standard boxes
✅ To order your free packaging:
- Call USPS at 800-610-8734
- Provide your Poshmark closet name to verify eligibility
- Request Ground Advantage supplies specifically
This packaging is only available to verified Poshmark sellers, so make sure you have your closet name ready when you call.
🛍️ How to Find Your Poshmark Closet Name
Before you call USPS, you’ll need to know your closet name, which is your unique seller ID on Poshmark.
On the Poshmark App:
- Tap your profile icon (bottom right)
- Your closet name appears at the top of your profile page, usually in the format
@yourusername
On Desktop:
- Log in and click your profile photo in the top right corner
- Select “My Closet” from the dropdown
- Your closet name is the last part of the web address shown in your browser (e.g.,
staceyknows
)
Write it down or save it somewhere handy—you’ll need it when requesting packaging.
🛠️ What to Do with Your Old Priority Mail Supplies
- Return full packs (10 or 25 count) to your local post office
- Use leftover materials for non-Poshmark Priority Mail shipments
- Recycle any unusable packaging