I originally ordered a size 6-9 months for my soon to be 12 month old dress based off of the size chart, but when it arrived it was very small. I emailed them for a return and got a response immediately. I was told to order the same dress in the size I needed (12-18 months) because I needed it asap and I would get refunded for the other dress. Customer service was extremely helpful and even gave me a coupon code for new order. Refund was sent to me as soon as they received the other dress. Completely satisfied!!!