How to pick the right size as your little one grows · Mimi
Mimi runs from Newborn (0–3M) right through to Kids (6–12Y). Sizing is by age and weight — when in doubt between two sizes, size up.
Bamboo cotton has a gentle stretch and softens with washing, so pieces stay comfortable across a growth spurt rather than feeling tight overnight.
Check each product page for the size guide image — it lists chest, length and weight ranges for that exact style.