Merle Minda walked into the main downtown Minneapolis post office with a package one day last week and got in line behind nine other people.
Fifteen minutes later, she advanced one place. Fifteen minutes after that, her husband came in from the car with a worried look on his face.
"He thought something bad had happened to me," said Minda, a Minneapolis writer. "He'd been waiting for half an hour for something he thought would take five minutes."
Post offices in Minnesota and around the country are jammed during the holiday season as people loaded with packages or in need of stamps confront understaffed service counters.
The U.S. Postal Service expects to deliver 475 million packages over the holidays this year, a 12 percent increase over last year.
"We've seen double-digit increases the past two years," said Pete Nowacki, the USPS spokesman in Minnesota. "Much of that is due to e-commerce."
Unlike retailers and other shippers, the postal system doesn't hire extra people for its counters during the holidays.
"It's difficult to train temporary folks to work the counter just for a season," said Nowacki. "It's a complicated job."