A bedsheet should fit the mattress properly, feel comfortable and suit your normal washing routine. Start with mattress length, width and depth instead of relying only on labels such as single, double or king because dimensions can vary.
Fabric choice
Cotton is popular for everyday bedding because of its familiar feel and breathability. Blended fabrics may offer easier care and improved wrinkle resistance. The weave and finish also affect softness and durability.
Fit matters
For fitted sheets, mattress depth is especially important. For flat sheets, allow enough extra fabric for tucking and movement during sleep.
Care
Wash according to the label, separate colours when necessary and avoid excessive heat if the material does not recommend it. Correct care helps preserve size, colour and surface feel.