· usps
USPS Flat Rate Boxes 2026: Sizes, Prices, Weight Limits
USPS Flat Rate boxes cost $12.90 to $34.00 retail in 2026 and hold up to 70 lbs. Full size chart, prices, and when flat rate beats Ground Advantage.
Shipping Guides & Tracking Tips
Carrier-specific shipping guides, tracking tips, and problem resolution articles.
· uspsWhere to Drop Off USPS Packages: All Locations and Rules
Drop off USPS packages at Post Office counters, 24/7 lobby chutes, collection boxes, approved stores like Staples, or via free home carrier pickup.
· tipsDelivery Exception: What It Means and What to Do Next
A delivery exception means the carrier hit an unexpected problem delaying your package. What it means at FedEx, UPS, USPS, and DHL, and what to do next.
· uspsUSPS Parcel Select Ground Is Retired: What to Use Now
USPS retired Parcel Select Ground in July 2023 and folded it into Ground Advantage. Parcel Select still exists, but only as a commercial bulk product.
![Do Stamps Expire? USPS Rules for Old Stamps [2026]](https://uploads.trackingadvice.com/2021/12/Do-stamps-expire-1.jpg)
· stampsDo Stamps Expire? USPS Rules for Old Stamps [2026]
U.S. postage stamps never expire: every stamp issued since 1860 is still valid postage. Here is how to top up old stamps to the 82-cent 2026 rate.
· shippingHow Long Does SHEIN Take to Ship? 2026 Delivery Times
SHEIN's own data shows 77.1% of US Standard orders arrive within 7 business days and 79.2% of Express orders within 6, counted from order date.