Brand NEW. Got this 3 pack of onesie from the Petit Bateau store in Paris. As you can see from the photos, never been opened but the box got a little squashed but it’s sealed (never opened). It’s listed as size 18m but because it’s a European brand bought IN Paris, I listed it for 12-18 month babies. Just depends on baby, go by baby size. If smaller baby, then could wear 18+ months. 100% cotton Standard 100 by Oeko-Tex