There's no need to wonder, the baby Zip WONDERSUIT Long Sleeve Rib baby zippy has extra winter warmth and the great BONDS fit you love. Baby long sleeve rib zip WONDERSUIT made from snuggly winter weight fabric Cozy cuff feet for extra warmth Two way safety zip protects bub's skin and allows for quick nappy changes Includes cuff mittens up to size 0 Bonds Sizing  0X5    Tiny Baby 0X4    Newborn 000    0-3 Months 00     3-6 Months 0      6-12 Months 1      12-18 Months 2      18-24 Months 3       2-3 Years