Tartan Kilt Onesie – This adorable onesie is available in multiple tartans and sizes. The onesie snaps at the bottom in traditional fashion and has a kilt sewn in making it a one-piece kilted onesie for your young Scot! Available in sizes 0-3, 3-6, 6-12, 12-18, and 18-24 months and tartans 7 tartans.