These Premium exercise book covers are made from the highest quality 220 micron PVC to ensure year round ultimate protection. These covers are specifically made to fit our Classmates A4+ (339mm x 240mm) exercise books and may not be suitable for other brands. Each cover when folded measures 345mm (Spine) x 246mm (Width). When open measures 345mm (Spine) x 495mm (Width). The clear transparent covers allow for easy identification of subject areas and school logos. They are easy to fit and offer great value for money.