The actual ship is 16 stories tall, and has more cargo space than a 747. When fully stacked (with the booster), I didn't see this, it is close to 400 feet tall.
Linked is a photo I took. If you zoom in real close to the object under the Ship on the road you can see a size comparison. And even this pic doesn't do it justice.
https://photos.app.goo.gl/nnTm8rge8KVGAvqb8