LittleForBig feature adorable prints and bright colors just like real baby onesies! Our prints and patterns are all upsized for adults so that you can look as little as you feel. LittleForBig adult baby onesies are made of 95% Organic Cotton 5% Spandex fabric that stretches to fit many body types. Unlike other brands, LittleForBig products are made to hug the body for a snug and secure fit. A row of 3 press Buttons secure the onesie at the crotch, providing plenty of support whether you wear a diaper under your LittleForBig onesie or not. All items are shipped in discreet packaging. PLEASE TAKE THE TIME TO MEASURE FOR YOUR SIZE. Available sizes Extra Small (XS) through 4X large (XXXXL). The most critical measurement is the "Length" which is best measured with a cloth measuring tape while wearing a t-shirt and diapers. Start at the collar in back running down the back and through the legs over the diaper, up to the collar in front. Divide this measurement by two and compare to the listed length.