Blue Nile Mills 100% Combed Cotton Twin XL Sheet Set, 300 Thread Count, Striped, White Cotton Imported ACCOMMODATING. 300 Thread Count 100% Combed Cotton 3-Piece Twin XL Sheet Set in White - Fits Mattresses up to 18" Thick. DESIGNED TO FIT. This Twin XL Sheet Set includes one pillowcase 20" x 30", one fitted sheet 38" x 80", and one flat sheet 66" x 100". The fully elasticized fitted sheet has a 15" pocket depth. HEAVENLY COMFORT. Indulge yourself in true luxury. Egyptian cotton is the frontrunner in luxury linens for its extra long staple length, which increases its strength as well as its smooth feel. EFFORTLESS SOPHISTICATION. For a beautifully harmonious bedroom, pair with our 300 Thread Count Combed Cotton Duvet Cover Sets and additional Pillowcase Sets, available separately. CONVENIENT CARE. Machine wash warm. Tumble dry low and remove promptly from dryer. To keep your bedding in its prime condition, follow instructions on sewn-in care label.