You can see how deep the box is, but for the sake of folding and putting in an envelope I wouldn't stuff it too full.
The best thing is, you can customize your colors according to the graduate's school colors. I have included the assembly video below. In the video, I used papers from Echo Park Go See Explore by Lori Whitlock.
And here is my video:
Gatefold Box Card Graduation Lori Whitlock SVG Shop
Graduation Box Card Silhouette Store
Have a wonderful day!