O'Shea Irish Coat of Arms Baby Onesie. Pass on your heritage to a little one with this Irish Coat of Arms Baby Onesie! Made from ultra-soft combed ringspun cotton and features a three-snap clasp. Dress your little one up with style. Your personal Irish Coat of Arms and surname displaying your proud Irish heritage is permanently printed on the front! We're sure we have the onesie that fits with 4 sizes ranging from 6 mo. - 24 mo.!