Centima Centium Core White Pillowcase by Standard Textile = Standard: 42" x 36" (1 pillowcase). Usually ships within 1-3 business days unless there is a problem. Centima combines luxurious cotton with texturized microfilament synthetic yarns, providing both cotton-rich comfort and unsurpassed strength. The result is truly innovative sheeting products luxurious and durable, comfortable and cost effectivethats Centima performance! 75% Ring Spun Cotton 25% Centium Microfilament Polyester