ConceitedPremium Women's Stretch Ponte Pants - Dressy Leggings - Wear to Work - All Day Comfort

Would these be appropriate for a casual-dress work environment? Jeans aren't appropriate, but dresses and skirts arent allowed.

I’m a size 7/9 am i a medium or large ?

Are they machine washable and able to be put in the dryer?

Are these snug like leggings? They look a bit baggy on the model, but I am not that small. I wear an 8.