Thinking of buying this dress for babies manyue celebration. What do you honestly think? Too grown up like? Also is grey an inappropriate colour for a celebration? They have the same dress in white as well.

My baby wore a grey dress from Chateau de Sable for her "full month" celebration too. I just termed it as Baby Shower instead because I didn't want to follow strictly to tradition and was late to celebrate it (tradition dictates that the full month celebration be held before the baby turns 30 days old). Just let the baby wear whatever you like. My girl wore a grey dress, but on hindsight, I should have put on a cute Minnie Mouse or bumblebee romper instead. She'd have looked much cuter.