NEW YORK — Lace is hot for the holidays, in all sorts of variations. While the Michael Kors store on Madison Avenue may not boast Old Navy numbers, the designer’s linen lace miniskirt from the resort collection is a smash. Shoppers have scooped up all 23 skirts on the selling floor — at $1,895 a pop — and the item has already been reordered for January delivery. Here, the skirt with Kors’s handknit silk sweater, $695, and leather belt, $195. For more on the season’s winners, see pages 4 and 5.