My baby shrunk!?

Ashlee

So when my little lady was born, she had a pretty gnarly cone head. They had said/written she was 19.5 inches long. At her first doctors appointment she only measured 18 inches. The nurse was confused, but then realized they must have measured her with her cone head, as her discharge papers stated she was 19.5 inches. It might seem like a stupid question, but if I were to get something made with her birthdate/time/weight and length and all, would I write she was 18 inches or 19.5 inches lol.