Product Description The Clairefontaine ‘Basic’ Books have a ruled 90gsm, acid-free paper that is bound with cloth that matches the cover color (red, green, black or tan) and is available in sizes 6×81/4′ or 81/4×113/4′. Clairefontaine, the legendary French mill, is now the only European manufacturer making its own paper for its pads. It’s also a company dedicated to sound environmental practices.