What women sizes are considered plus size?

In the United States, plus size is typically considered to start at a size 14 and go up to a size 24 or 26, depending on the retailer. However, some retailers consider plus sizes to start at a size 12, while others may consider them to start at a size 16 or 18. International sizing can also vary, so it's best to refer to the specific retailer's size chart when shopping for plus size clothing.