Perfect Deep Mattress Fit - Mellanni specifically designed these sheets for extra DEEP mattresses and they are a perfect fit for 17 inch, 18 inch, 19 inch, 20 inch and even 21 inch mattresses. They are perfect for extra tall and thick mattresses, double pillow top mattresses, memory foam toppers, big mattress pads, air mattresses, waterbed mattresses and even adjustable beds! For mattresses 16" and under try Mellanni classic collection sheet sets | Extra Deep Pocket Full Size Sheets come with Mellanni Signature Z-fold technology elastic edging all around and insures your Extra Deep fitted sheet will stay in place, will not shift and elastic will never snap. 4 PIECE Sheet Set - Full Size Sheets include 1 flat sheet 96"x81", 1 fitted sheet 75"x54"x21", 2 pillowcases 20"x30". Pillowcases have straight opening and beautiful decorative embroidery. Great for any room in your house - bedroom, guest room, kids room, RV, vacation home, or bnb | Highest Quality Brushed Mircofiber - Mellanni's Signature highest quality double brushed 1800 collection microfiber complemented by superior workmanship make our bed sheet sets Last! They are extra silky soft, more comfortable and more durable than cotton. Fabulous selection of colors will make your bedroom look like it belongs in a magazine. Great gift idea for house warming gift, men and women, Moms and Dads, Valentine's - Mother's - Father's Day and Christmas | Easy Care - Fade, stain, shrink, pill and wrinkle resistant. Pet friendly. Machine wash in cold. Dries quick on tumble dry low | Mellanni Lifetime Promise - Mellanni is a different kind of company that prides itself on providing the absolute best customer service in the industry. If you are not satisfied with your purchase at any point and for any reason, you can return it with no questions asked. That's the Mellanni Promise (in fact, you don't even have to send back the product)