We provide garment sizes in individual product listing as an age range (e.g. 6-9 months) for quick reference. However, babies are little individuals and can vary dramatically in size from the "standard" set for their age groups. For buying best suited size, measure the baby for whom you are purchasing an item and compare those measurements to the ones provided in the below table.
Usually baby’s height in cm for clothing, head circumference for hat and foot length for booties are enough to find the perfect fit.