- Wonderful condition. These onesies are so adorable! - 100% cotton, perfect for daywear and nightwear - Gerber size 0-3 months, only onesie with dinosaurs is Old Navy also size 0-3 months - These would fit a newborn baby to 3 months well - The yellow onesie has a tiny blue mark on it. It was manufactured and bought like this (it’s the same color as the print). Shown in the last picture!