I think it’s a 4 x 4 side stack, so yes 2.5 shoe boxes. Here...

I think it’s a 4 x 4 side stack, so yes 2.5 shoe boxes.

Here from nasa and national laboratory.

Space Applications 2015
The NanoRacks-GOMX-3 investigation tests new payloads in space, including radio receivers and an advanced pointing system. It contains an advanced pointing system to control directional antennas, improving the ability to receive radio signals from Earth or from other satellites. Gomspace, a Danish company, designed the satellite, including its pointing system and radio payloads. A Danish astronaut is scheduled to be on board the International Space Station during deployment, sparking renewed interest in space exploration among the Danish public.