Be sure to use the size chart, it comes with a very cheap tiara that broke before I could assemble itπ but the dress is just beautiful! Looking like a custom made dress for less than $25, you can't go wrong with this Elsa dress. You will be given a measuring stick and measure your child's height from shoulder to ankle and tummy area. Batteries are not included but they are the same as the fairy lights that Revain sells anyway! Got a pack of Brighton CR 203 2 3v lithium batteries and I think there were 15 or 20 for less than $10! My baby isn't here, but when she sees this dress she'll be happy. May I add that the lights are pretty stable which is amazing for Halloween and trick or treats. and at your door in 2 days if you have Prime! Definitely worth every penny even if I have to buy another crown before she sees it! I ordered size 110, I think it's 3 slashes for tee, thank you very much @shinyou! Now that I know the quality I will order for my niece today.