The European complexes of bedding are often equipped with four pillowcases: two — 50 × 70, two — 70 × 70. A good manufacturer tries to avoid vague formulations of the dimension of linen and necessarily indicates clear sizes and completeness on the packaging. Depending on seasonality, double sets differ in the material used in the manufacture of. Summer sets are made of light and breathable material, and winter from more dense and retaining heat.