Designed to fit a baby 18" to 22" long and to fit a standard bassinet or similar size mattress approximately 18" wide and 1" deep. Made in the USA from high quality anti-pill fleece, 100% cotton or an organic soy/cotton blend. Conforms to safety standard of ASTM F1917. Patent #7,150,054 & 7,337,482 additional patents pending. Hospital and SIDS institute tested. Pediatrician and obstetrician approved. Designed by moms for moms to allow safe, comfortable sleep and reduce the risk of SIDS & accidental death and the symptoms of reflux.