Hello Ashley and welcome to the Disney Parks Moms Panel.
When my own dear children were only young little Mouseketeers they used to enjoy being transported about the magic of Walt Disney World Resort in a double stroller together and I absolutely loved the sheer convenience of it! Although at this time I don't have any actual seat dimensions to share, I can tell you that double strollers are currently recommended for children weighing 100lbs or less. For Guest convenience
Stroller Rentals can be found at each Disney Theme Park and at Disney Springs and you'll be pleased to know strollers can be rented daily or even for length of stay.
Plus there's also the great alternative of arranging
private stroller hire through one of the
Disney Featured Providers. To help make a considered choice of stroller you will find that each
Disney Featured Provider's website (found via this
link) includes full stroller dimensions for your perusal.
I also thought you may find this recent Moms Panel Monday feature article
Disney Parks Blog ~ Travel Tips for Little Ones to be an extra helpful planning resource for your families upcoming trip to Walt Disney World Resort.
Have a great Disney day.
~ Jane