Never pay for the boxes themselves at a USPS counter; the box is free, you only pay the postage when you ship.
It saves you the trip and ensures you get the specific shape (Top Loading vs. Side Loading) you need. where to buy flat rate shipping boxes
Staples or OfficeDepot often stock them, though usually for a small markup or as part of a shipping service. Never pay for the boxes themselves at a
Most USPS locations provide them for free in the lobby. Staples or OfficeDepot often stock them, though usually
Local "Pack and Ship" stores often carry the full range of Small, Medium, and Large sizes. 💡 Pro-Tips for Your Story
You can pack up to 70 lbs in a single box without the price changing.
Elias was a restorer of broken things—chipped porcelain dolls, rusted pocket watches, and weathered letters. His clients lived in distant corners of the world, connected only by the hope that their treasures would arrive intact. He chose the Flat Rate Box not for the price, but for the promise: "If it fits, it ships."