Raise a glass to the season with Karen Millen’s 2025 collection of plus size Christmas party dresses. Expertly designed with structure and silhouette in mind, each dress is crafted to flatter and sculpt your figure with confidence. Discover timeless black plus size Christmas party dresses in luxurious fabrics like satin, silk, velvet, sultry mesh, and our signature Compact Stretch, which offers a second-skin fit. For office-friendly holiday looks, choose A-line or midi styles that strike the perfect balance between professional polish and festive charm. Add sparkle with our shimmering sequin dresses or embrace rich winter tones and warm reds for a bold, celebratory look. Pair statement pieces with sleek stilettos or layer metallics for a complete, party-ready outfit. Whether you love intricate detailing, ornate embellishments, sleek monochrome, or bold color-blocking, this collection has a versatile, show-stopping dress for every holiday occasion.