Stretch plain knit seamfree nude heel 'Superfine' 100% nylon stockings in approximately 15 denier, but this isn't specified on the pack. The stretch is quite minimal, and the stretch welt/top is exceptionally narrow, measuring only 25mm! The sizes shown in the table below are the closest estimation - the manufacturer's sizes are 'Small', Medium, and - no surprise - 'Large'. These are 'everyday' modern British stockings offered at a very realistic price.