Need help buying my girlfriend a dress

Hi yall, ive been wanting to buy my girlfriend one of those really cute picturesque dresses but I genuenly have no clue where to even start, price wise im willing to spend up to like 350 usd use as this will likely be a Christmas gift. Any help is really appreciated! (And as an aside just cause It caused issues last time I posted i know my profile says I recently went through a breakup but we patched things up and doing better in case anyone is wondering 😆)