Hi ya, Gabriella!
Welcome to the Disney Parks Moms Panel. Just a few years ago, I had
three kiddos under three, so I understand the need for a stroller big enough to corral all.the.things! I joke with my husband that sometimes I feel more like a sherpa than a momma when we head to the Parks!
As you know, Disney recently modified it's
Stroller Guidelines to make Park visits pleasant for all of its Guests. Your stroller must fit within the dimensions of 31" wide and 52" long when it is open. I did a quick Google sEARch of the Joovy Balloon Lightweight Stroller and found that open it is '25" long and 18.5" wide, so you are good to go! (I think you were looking at the height dimensions, which you are correct, is 40.5"!).
In case you don't want to bring a stroller with you, Disneyland Resort has
Stroller Rentals at
Disneyland Park and
Disney California Adventure Park. As my kiddos have gotten older, this has become our go-to option. They are roomy, comfortable, and, most importantly, water-proof! Disney also has a Featured Provider (ScooterBug) from whom you can rent a stroller. They will deliver and pick-up from your Disneyland Resort hotel, so they do all the heavy lifting for you!
Gabriella, you are going to have a fantastic time at the
Happiest Place on EARth. It is magical all the time but is especially pixie-dusted through the eyes of the littles. If you have any other questions, please don't hesitate to come back.
Rayna