Personalized Retro Rainbow World's Best Big Sister Toddler Dress. This delightful design not only celebrates the big sister but also emphasizes the joy of sisterhood. With its eye-catching rainbow theme, it’s a fun addition to any wardrobe. Gift it to the best sister ever and watch her beam with pride as she embraces her role in the family! Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!