Black Stiletto Heeled Over The Knee Boots Indulge in ultimate streamlined chic with Gasp from Carvela. A confident approach to the over-the-knee silhouette, this leg-lengthening style is designed in supple black for understated elegance that will slip easily into your collection. A feminine stiletto heel offers 90mm of height with a trending edge, making these the ultimate OTKs to greet the new season.