Clothing size for ladybug

I saw somewhere on here before that Ladybug can wear 9 month old clothing…is that correct? 9 months seems like it might be a little big. Does anyone know for sure what size she wears?

Thank you! I finished Ladybug tonight, but I forgot to get her some clothes… so its off to Target tomorrow for baby shopping.

I bought my Cuddles a 12 mos onesie and 9 mos skirt. Mostly the 9 mos sizes seem to be the fit for her.