Infant and Toddler Sizes

Infant sizing runs by month: 6M, 12M, 18M, 24M, measuring roughly 16 to 19 inches in body length on a piece like a Rabbit Skins 3322 bodysuit. Toddler sizing switches conventions entirely once a child moves from a onesie cut to a standard tee body, running 2T through 5T or 6T and adding roughly an inch of length and an inch of chest width at each step up.

Baby shower merch, family reunion tees, and tiny team mascot shirts all live in this range, and the print area shrinks right along with the garment. Where an adult chest print might run 12 inches wide, an infant onesie print typically maxes out around 3 to 4 inches before it starts crowding the snap closures at the bottom.

Converting between the month scale and the T scale isn't a straight math problem. A 24M infant piece and a 2T toddler piece land close in body length, but the toddler cut runs looser and boxier through the torso since it's built for a walking, diaper-wearing toddler rather than the snug bodysuit silhouette of an infant piece, so the jump from M to T is really a fit change dressed up as a size increment.

The mistake in family-matching orders is assuming a design scales cleanly from a 12-inch adult front print down to an infant or toddler tee. A print that size would swallow the entire garment. Infant and toddler art needs its own 3 to 4 inch build from the start, and fine detail that reads perfectly fine at 12 inches often disappears completely once it's compressed down to that scale.