I opened it, but I haven't used it and have kept it at home. I bought it several years ago. There's an opening at the back. Please check the second photo. Outer: 73 x 73 cm Nude cushion size inside: 63 x 63 cm It's a little large. No pets, no smokers. It's new and unused, but it's been stored at home. Please refrain from purchasing if you are concerned. 【High-Quality Materials】 Ralph Lauren products are made with durability and comfort in mind. This pillowcase is also expected to be made of long-lasting materials. - Brand: Ralph Lauren - Design: Striped pattern - Character: Polo Bear