Acrylic Knit Hat, Black by Mark Richards. $9.06. Acrylic Knit Hat, BlackMARK RICHARDS-Acrylic Knit Hat. This simple yet elegant cable knit hat is beautiful on its own but it also makes a fantastic base piece ready to be embellished to fit your own personal style and flair! Clip or pin on a variety of accessories (not included) and get a new look every day! This package contains one hat: 8 inches deep; 9-1/2 inches wide when laid flat. Imported.