babys first birthday outfits long sleeve t-shirt top with buffalo plaid pant (black sleeve, 12-18 months) one's baby boys first birthday outfits cotton long sleeve wild one t-shirt top with buffalo plaid pant christmas costume,perfect matched with babys wild one birthday theme <br> size details; <br> 6-12 months:chest:17.3"; top length:14.6": sleeve:12.6"; pant length:16.1"; <br> 12-18 months:chest:18.9": top length:15.4"; sleeve:13.4": pant length:16.9"; <br> 18-24 months:chest:20.5": top length:16.1"; sleeve:14.2"; pant length:17.7"; <br> 2-3 year:chest:22.4": top length:16.9"; sleeve:15.0"; pant length:18.5"; <br> 4-5 year:chest:23.6": top length;17.7"; sleeve:15.7"; pant length:19.3"; <br><br> red+headband set <br> 0-6 months;bust:18.1": top:14.6"; pant:14.2" <br> 6-12 months;bust:18.9"; top:15.4"; pant:15.4" <br> 12-18 months;bust:19.7"; top:16.1"; pant:16.5" <br> 18-24 months;bust:20.5"; top:16.9": pant:17.7" <br> pls make sure check the size chart first.pls noted that the size will have slightly error through hand measure.