Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4231672. Modelled a section of 35mm x 10mm DIN rail for use as a reference for another design (not really intended for printing, but should be possible). Overall width is 35mm, overall height is 10mm, internal width is 25mm and base width is 30mm. Wall thickness is 1.6mm. The length is 100mm and could be combined to make longer sections.