Size is 150x60mm. Cad source provided (OpenSCAD). The model is fully parametric and can easily be changed to fit your needs. I used a heated bed (50 degrees C) to avoid warping issues. Link arms were printed with a resolution of 0.16mm, the rest with 0.24mm.

For assembly you will need: 16 M3x10mm screws 16 M3 nuts

Update 2021-04-02, v1.1: Source updated to include an optional carrying handle.

Proposed extra material for handle: Aluminium pipe 2x150mm, dia 5mm/3mm 4 M4x6mm screws (if pipe endpoints can be threaded) Alternative, threaded rod M3 2x164mm + M3 lock nuts

Update 2021-04-07, v1.2: Fixed minor scaling issue Added support for larger handle screws

Update 2021-04-11, v1.3: Added scaling parameter Fixed scaling issue of hinge_width Added screws types M4x6 and TPPT2.5x6 Added parameters for handle screws

Enjoy!