I received this from an acquaintance about 5 years ago. I don't think it's new. My children didn't wear it. It's quite small, so I recommend it for a newborn baby. There was no tag, so I'm estimating the size to be 50. ※! Note! I couldn't select "50" as the size on Mercari, so I've listed it as size 60. Please consider this point regarding the size when considering a purchase. I have guinea pigs, but I'm storing this in a separate room. This is a used item, inspected and stored by an amateur. I'm also selling this on other sites, so please comment before purchasing. Feel free to ask any questions! #BabyVest #Newborn #BabySize50 #RetroKnit - Color: Yellow, Brown, White - Design: With buttons, Sleeveless - Material: Fleece-like fabric Thank you for looking.