Background: striped sc
Lace: overlay (surface) crochet lace added later as a trim
Seams: no seams
I’ll be happy to help with pattern questions at Natasha Robarge: Love for Contemporary Crochet group.
Last pictures: a swatch with a different stripe pattern (looked to me more appropriate for fall; somehow I see this striped skirt with high boots) and an originally submitted swatch in mercerized cotton and #20 crochet thread (can be used for a top).