Toddler (Size 2-4T, 1-2 Yrs) Looney Tunes Tweety Costume Child Warner Bros. TM costume includes headpiece and jumpsuit Child Toddler (Size 2-4, 1-2 Yrs)), Small (Size 4-6, 3-4 Yrs) and Medium (Size 8-10, 5-7 Yrs) Mftr. has changed sizing as above primarily because many people still think "size" should match "age" as when univ. sizing began years ago, yet children are "grown bigger" today - AND costumes tend a bit small. So purchase by Size 1st if you know it, then