The shoes didn’t get heavier. The postage did get more expensive. USPS’s temporary holiday package surcharge started October 4, 2026—and if you’re shipping sneakers, that extra cost needs to be in your math before you promise someone “shipping included.” The adjustment covers domestic Priority Mail, Priority Mail Express, USPS Ground Advantage, and Parcel Select . USPS announced a window starting at 12 a.m. Central Time on October 4, 2026 and ending at 12 a.m. Central Time on January 17, 2027 .