Here is a set from the 2009 Gymboree Happy Rainbow Swimwear line.  Swimsuit is size 2T, hat is size 2T-5T, and sandals are size 7/8. New with tags.  Set includes:

Happy Rainbow Swimwear Flower Polka Dot Rash Guard Set size 2T - 80% nylon 20% spandex swim set has a rash guard top with an applique flower on the front and polka dot raglan sleeves, and separate polka dot pants with an elasticized waist.

Happy Rainbow Swimwear Polka Dot Sunhat - size 2T-5T - 100% cotton canvas hat has allover polka dots, an interlaced yellow poplin tie with a bow in back, and a poplin lining.  Color: turquoise.

Happy Rainbow Swimwear Rhinestone Polka Dot Flip Flop Sandals - size 7/8 - thong sandals have yellow faux patent straps with rhinestones, a hook and loop ankle strap, polka dot insole, and textured sole.

Please email me with any questions or for more pictures.  All of my listings come from a smoke free environment.  Take a look at my Ebay store for other Gymboree items - I am happy to combine and reduce shipping charges for multiple purchases.