Welcome back to Disney Parks Moms Panel, Amy!
Keep that princess dreaming royal dreams as long as you can; it's so much fun to see young ones caught up in the magic that is
Walt Disney World!
Before you head to WDW, be sure to download the super-helpful
Shop Disney Parks app. There, you can search for a specific item, and the app will show you which locations have that item--in your size--at this very moment. There, I searched for princess dresses and selected Size Chart, which shows that the largest size for these is a Youth XL. That converts to a 14/16, which should fit kids 60-64" tall, 85-100 lbs., chest size 31-32" and waist 26-28". Select the size, then "Find on Map", which will identify all locations that have this dress in stock. Even better, you can have that item shipped to either a WDW park entrance or to your Walt Disney World Resort hotel. Want to send it straight home? You can do that, too! So cool!
Also, check out
World of Disney (Disney Springs),
Mouse Gear (Epcot) and
Emporium (Magic Kingdom) for the largest selection.
DisneyStore.com has similar sizing to what's available in the parks, so take a look there, too. We would often pick up the perfect character outfits before heading to WDW and pack them with us, matching each character to the park we'd tour that day; I
totally understand your daughter's excitement. I'm still VERY into Disney, too! :-)
Happy shopping!
Andrea H