Pinstripe trousers straight fit

Bought at a vintage store in Philadelphia. Got them dry cleaned and worn once, but they are too small on me. While the tag says 6P, I think they would fit best on someone who is a 2 or 4. For reference, I am 5’4”-5’5” and the length is perfect on me. Has pockets. Double closure with bottom and hook so it lays flat when done. Would be great for the office or I had also imagined styling it with a graphic tee and sneakers