This is a little stand for Raspberry pi 3 in a case. The case is a common transparent case - it came in a kit with the raspberry pi. It is 25~26mm thick depending how you squeeze it :-)
There was a similar stand on thingverse, but in a format that I couldn't import so I quickly made my own. It fits perfectly the case on picture.

No

10%

There is a little lip overhang inside of the guides for tight fit, it doesn't need support on most printers (it is 0.5mm filet).