The strike of Starbucks baristas protested the company's new dress code grew on Thursday.

Starbucks Workers United, a union representing the coffee giant, said more than 2,000 Starbucks baristas at 120 U.S. stores have protested new dress codes since Sunday.

Starbucks starts on Monday with new restrictions on what baristas wear under their green aprons. Dress requirements require employees operating and licensed stores in the U.S. and Canada to wear black shirts and khaki, black or blue denim bottoms.

Under previous dress codes, baristas can wear a wider range of dark and patterned shirts. Starbucks said the new regulations will make its green apron stand out and bring a sense of familiarity to customers when they try to build a warmer, more enthusiastic feeling in the store.

But the union of Starbucks Workers United, which represents 570 workers in the U.S. stores owned by 10,000 Starbucks companies, said dress codes should be negotiated collectively.

"Starbucks has lost its way. Instead of listening to the barista of Starbucks experience, they focus on all the wrong things, such as implementing restrictive new dress codes," said one Starbucks from Hanover, Maryland-based Paige Summers. “Customers don’t care what color our clothes are when they wait for 30 minutes.”

Summers and others have also criticized the company for selling the style of Starbucks-branded outfits that no longer allow employees to work on their internal websites. Starbucks said it will offer two free black T-shirts to each employee when each employee announces new dress codes.

On Wednesday, the Starbucks Workers Union said a total of 1,000 workers staged a strike at 75 stores in the United States. Starbucks said at the time that the strike had limited impact on U.S. stores operated by its 10,000 companies. The company said in some cases, the strike closed stores for less than an hour.

"If the union could put in the same effort to get back on the table, it would be more productive. "Today, more than 99% of our stores serve our customers and it's been a full week." ”

Starbucks workers Manchester United have been in the U.S. Store League since 2021. Despite agreeing to return to the negotiations in February 2024, Starbucks and the union have not reached a contract agreement.

The union said this week it filed a complaint with the National Labor and Industrial Relations Commission accusing Starbucks of failing to bargain.