I want to have page layout similar like so:
...
┌───┐PAGE 13 "NORMAL"
│ │a4paper, vertical
│ │
└───┘
┌───┐PAGE 14 "DIFFERENT"
│ │a5paper, vertical
└───┘
┌─────┐PAGE 15 "DIFFERENT"
│ │custom, vertical
└─────┘
┌───┐PAGE 16 "NORMAL"
│ │a4paper, vertical
│ │
└───┘
...
I could make separate one-paged PDFs with such dimensions and insert them in, but I want to know if it's possible to make specific pages change their dimensions in a single LaTeX document.