What’s changing with USPS on July 12, 2026
USPS is rolling out a handful of rate and rule changes on July 12. Most won’t touch a typical clothing or home-goods package — but a couple are worth knowing so nothing catches you off guard at checkout. Here’s the plain-English version, and the one habit that keeps your costs down.
- Measure the outside of your box accurately — USPS now rounds every measurement up to the next inch, and box size counts for more than before.
- Shipping to Alaska, Hawaii, Puerto Rico, or military (APO/FPO/DPO) addresses? Light packages under 1 lb will cost a bit more. Continental US is unchanged.
- Good news: more long packages now qualify for cheaper Cubic pricing (max length went from 18" to 22").
- New fees for oversized shipments, plus a $50 penalty for shipping hazardous items without declaring them — almost never an issue for everyday clothing and home-goods packages.
The one thing to actually do: measure your boxes
If you take away one thing, make it this. USPS is putting more weight on package size, so accurate measurements are the easiest way to avoid paying more than you should. Two things are changing under the hood:
- USPS now rounds every measurement up to the next whole inch. A box that measures 10.2 inches gets counted as 11.
- The formula that turns a box’s size into a “size-based weight” got stricter, so larger boxes can trigger a higher charge more often.
What’s changing, and whether it affects you
1. Small, light packages to Alaska, Hawaii, Puerto Rico & military addresses
For packages under 1 pound going to those spots, USPS is switching to one flat rate — everything under 16 oz will cost the same as a 16 oz package. So a light 2 oz item to Hawaii ends up costing the same as a nearly-1-lb one.
2. Box size now matters more
This is the big one, and it’s covered above: measurements round up to the next inch, and bigger boxes are more likely to be charged by size instead of weight. For everyday clothing or home-goods packages in right-sized boxes, this usually won’t change much — but for anything bulky, measure carefully.
3. A little good news: cheaper Cubic pricing for longer boxes
USPS raised the maximum length for Cubic pricing from 18 inches to 22 inches. Cubic is a cheaper way to price small, dense packages, so this means more of your longer packages can now qualify for the lower rate. This one works in your favor.
4. New fees for oversized & hazardous shipments
There’s a new $200 fee for packages that are oversized or overweight (over 70 lbs, or very large), plus a new $50 penalty for shipping hazardous items without declaring them — it’s non-refundable, and it applies to Priority Mail, Priority Mail Express, and Ground Advantage. For everyday clothing, accessories, and home goods, this almost certainly won’t apply to you — it’s aimed at unusually large or restricted items.
The bottom line for most Thryft sellers
If you ship normal-sized clothing or home-goods packages within the continental US, your costs mostly stay the same. Keep your boxes small, measure the outside accurately, and you’ve handled about 90% of these changes. When in doubt, check the live rate before you buy a label — you can see exact pricing on the USPS Shipping Calculator right in your dashboard.
Common questions
Do I need to change anything about how I ship?
Just one habit: measure the outside of your box accurately before buying a label, and use the smallest box that fits. That’s the single best way to avoid paying more under the new rules.
Will my shipping get more expensive?
For most sellers shipping normal-sized packages within the continental US, no. Costs go up mainly for lightweight packages headed to Alaska, Hawaii, Puerto Rico, or military addresses, and for large or bulky boxes where size drives the price.
Why does USPS care about my box size and not just the weight?
USPS charges by weight or by size — whichever is higher. A big, light box takes up truck space, so they price it by size. That’s why a right-sized box saves you money: less empty space means a lower size charge.
What counts as a hazardous item?
Common ones for resellers: perfume and cologne, nail polish, aerosols like hairspray, and anything with a lithium-ion battery — including used or damaged electronics. These need to be declared when you ship them. If you’re unsure, just ask us.
Do I need to do the rounding math myself?
No. Just enter your package’s real measurements when you buy a label and the system handles the rest. Your only job is to measure the outside of the box accurately.
