I'm not sure what age girls become too old for bonnets, but figure that if it fits then she's not too old. I fell in love with this dress and bonnet from Janie and Jack, with whom I have a love/hate relationship. I love their clothing but I hate to give them my money.
I wish more girly dresses cam in blue floral. I love it because it has a vintage feel and Little Miss loves it because it has polkadots and a hat. I'm lucky that she loves hats so much because I'm a sucker for matching hats.
The first photo is by far my favorite of the batch.