LattePanda 3 Delta of LattePanda-3D-Models file is not opened

https://github.com/LattePandaTeam/LattePanda-3D-Models/tree/master/LattePanda%203%20Delta

LattePanda 3 Delta 3D Model V1.1 202210.stp does not open by stp file viewer

I want to know only dimension size of board

Could somebody dimension snap shot from LattePanada 3D Modeling file?

I think that  LattePanda 3 Delta 3D Model V1.1 202210.stp  

is so big, view not open  or that file has some problems. another stp file is opened normally