Justice League Childrens Boys Invincible Reversible Duvet Cover Bedding Set (Twin Bed) (Multicoloured) Bed set with reversible Justice League design. Choice of Single or Double sizes. Size- Duvet cover: Single- 54inch x 79inch, Double- 79in x 79in. Pillowcase: 19inch x 30inch (all approx). 100% Polyester Microfiber.