Nui Organics Baby Potae Beanie Ribbed Merino Wool Hat in Stone Size 0-6M but wore it from 3M to 24M. Lasted for 2 winters and didn't look too big or too small at any point because of the natural stretch of the ribbed knit. It's just the nicest wool. 100% merino wool - so soft, no hesitation to put it on newborn's skin. LIKE NEW. No stains, marks, defects, odors, or signs of wear. Smoke free and pet free home. Hand washed, unscented wool detergent, hung dry. Will not smell like someone else!