Simply mount to the wall using a hook or nail. The model can be scaled to any size to fit your space.
If you're using a 250mm x 250mm printer and want to print a larger version, I recommend splitting the model into two parts and cover with paper mache. Image shows model covered in paper mache and hand painted.
Hand Paint or use as an armature for paper mache.
Tip: You can print and cover the model with paper clay. Here's a helpful guide: Paper Mache Clay https://www.ultimatepapermache.com
For personal use. NON Commercial.