We make the pillow cases slightly larger to allow for shrinkage The actual size before washing 12x18 is 13.5 x 19.5 The 13x19 is 14.5x21 The 14x21 is 15.5x23 WHAT SIZE TO BUY: If your pillow measures 11x14, 12x16, or 12x18 Including our Perfect Little Pillow and you want a tight fit after washing buy the 12x18. IF your have a 12x16 or 12x18 Pillow and you want a loose fitting case buy the 13x19 Pillow Case. If your pillow is 13x19 and you want a tight fitting case buy the 13x19 pillow case. For a loose fit buy the 14x21 If you have a 14x20 Pillow or our 14x20 Perfect Pillow buy the 14x21 pillow case Welcome to AB Lifestyles We cut and sew our Travel Pillow Cases right here in Antreville SC in our workroom We strive to keep all our products made in the USA Feel free to ask any questions we have excellent customer service that works here with us. Do check out our Perfect Little Pillows that we make here 2 13 x19 Travel Pillow Cases 100% Cotton Percale Pillow Cases Italian Cotton. Perfect for Travel or Kids. Soft and durable Great for your next Airline flight Available in 7 Colors AND 3 SIZES