Workers are on strike at hundreds of Starbucks stores. Yet, how big a strike and what the consequences will be remain uncertain.

Starbucks (SBUX) updates on impact of barista strike at select stores in the U.S., as shares fall 5% and Workers United plans largest-ever strike

The walkouts launched by Starbucks (SBUX) workers pushing for better working conditions and wages are ramping up to reach dozens of stores and several major metro areas.

Starbucks (SBUX) baristas are continuing to strike as part of a planned five-day walkout — which originally started in Los Angeles, Chicago, and Seattle last — over contract negotiations. The walkout caused around 60 stores to close as the strike is expected to expand to more than 300 locations across the US,

A five-day strike by Starbucks baristas had closed at least 59 stores as of Monday afternoon, according to the union organizing the workers

A dayslong holiday strike against Starbucks ended on Tuesday with the largest work stoppage ever carried out by the company's unionized workers, involving strikes at more than 300 stores in dozens of cities nationwide,

A rolling strike of Starbucks baristas began Friday and grows to include about 300 of the coffee giant's shops across the U.S.