I really loves these onesies. I bought 12 month size, fits my big 4 month old perfectly, he’s almost 20lbs and at least 64cm tall. I usually don’t like onesies because they seem so tight around his thigh/groin area, but these are comfy for him because of how stretchy the fabric is. I absolutely love the colours and patterns. I love the fabric - it’s lightweight, breathable, soft, and stretchy which makes it easier to get his arms in the arm holes. I’ll 100% be buying these again in a larger size for when he outgrows these ones.