Small Project Box 100mm x 55mm x 30mm

Here is a small project box for yours project needs, with external measurements of 100mm long, 55mm wide and 30mm deep (3 15/16" x 2 3/16" x 1 3/16") and 95mm x 50mm x 25mm (3 ¾" x 2" x1") internally. There are 4 mounting standoffs approximately 75mm  (3") x 10mm (3/8") and 6mm (¼") high. 

The model prints solid and has a lid with chamfered mounting holes. 

You can drill holes where needed or add them in CAD.