Yes, the ruffle-neck top and the wide-leg pants arrive together as one set.
Based on the product details, both pieces are cut relaxed; the elasticized waists give gentle shape at the hip and waist so it reads easy, not oversized.
Machine wash cold on a gentle cycle and hang to dry. The pile recovers on its own, so there is no ironing.
Yes. The top works over slim pants or a skirt, and the pants pair well with a plain knit or tee.