China size 3x is like an xl here. I learned that the hard way. As long as they have made American clothes they should be right but they aren't unfortunately. If they are stretchy material it may fit a 18w but I bought jeggings 3x at Walmart threw away the tags tried to put them on and they were like a 16 and I wear a 20 or 22. Its sad that they dont give these jobs to uSA.God bless.