This is a basic box that is open at the top. Size is defined by outside dimensions: Length, Width, Height and Wall thickness in mm. Inside dimensions will be smaller by 2 times the wall thickness in L and W.

To create your own STL file to print, click [Open in Customizer] and enter your dimensions.

For best results use a wall thickness that's a multiple of your extrusion width. I set my extrusion width to 0.5mm and work in multiples of that (1.5mm, 2.0mm, etc).

This is created using OpenSCAD as a first exercise. It's pretty easy to use, check it out.

Box pictured is 172L x 32W x 25H x 1.5T

Thingiverse seems to be having some issues with the Customizer. If you have problems try downloading the file and editing in OpenSCAD.

If you print one please consider posting a picture and printer details. Hope you find it useful.