Matrix Magnum Series and Rogue Weight Plate
I have written the sizes in full below

shoulder bench:
l:1.39
w:2.00
h:1.86

Decline Bench:
l:1.93
w:2.00
h:1.34

Incline Bench:
l:1.63
w:2.00
h:1.61

Flat Bench:
l:1.88
w:2.00
h:1.36

https://www.matrixfitness.com/eng/strength/magnum 
https://www.roguefitness.com/ 

If you have a problem with the rough material on the barbell, please take it without displacement. I have embedded the material for rendering from a distance, because the V-Ray engine can't do the displacement close-up with high-rendering quality.