- For Stomach and Back Sleepers Standard size 18 x 26 x 2.5 inches; 1 piece per pack; machine washable as a whole pillow. Special design for stomach sleepers and back sleepers who suffer from back or neck pain. - Ultra Slim and Flat 2.5 inches thick; ideal height, low profile for stomach, back and even small-framed side sleepers. - Why choose Thin Pillow If a pillow is too high, neck muscles may become strained and cause neck and shoulder pain over time. This thin pillow is designed especially for stomach sleepers and back sleepers who need a thinner pillow to naturally stretch the neck muscles and support the head and neck. - Filling and Construction Filled with 3D hollow microfiber; cotton cover. Baffle box construction and 5 quilting grooves for air ventilation, helping keep the filling evenly distributed and preventing clumping after washing. Piping edge adds a decorative finish and improves durability. - Use scenarios Ideal for stomach sleepers with neck or back pain seeking gentle, low-profile support. Suitable for back sleepers who want neck-friendly alignment without a high loft. Good for small-framed side sleepers preferring a low-profile pillow.