SPASILK 100% super soft combed interlock cotton bodysuit - these lap shoulder bodysuits are made of the finest cotton available. The softness of our cotton will astound you and make it the only bodysuit that you will want your precious baby in. We scoured the world for the finest quality cotton and SPASILK is proud to offer only the best for your baby. SpaSilk fits infants Preemie to 24 Months. Preemie-up to 5 lbs, up to 2.3 kgs Newborn-5 to 9 lbs, 2.3 to 4.1 kgss 3 Months-9 to 12 lbs, 4.1 to 5.5 kgs 6 Months-12 to 18 lbs, .5 to 8 kgs 9 Months-18 to 21 lbs, 8.0 to 9.5 kgs 12 Months-21 to 24 lbs, 9.5 to 11 kgs 18 Months-24 to 27 lbs, 11 to 12.4 kgs 24 Months-27 to 30 lbs, 12.4 to 13.8 kgs