Creating Materials to Scale from image? Firstly, I'm using blender 2.8 and the cycles rendering engine.

I work for a company what sells PVC bathroom paneling and want to create a bathroom with these panels on the walls...

I have images of all of our wall panels to a scaled size (1m wide to 2.7m height)

I was wanting to create an image based texture on blender which would use these images as a scaled reference (So if the material is applied on a 2.4m standard wall it will not squash it down) likewise, if it is applied on a 5m wall, it will repeat 5 times and not stretch it.

I'm sure previously in Maya i've seen that you can actually define a material size. 

How would this be achieved in blender? 

This will be a base material which i will then add the diffuse and gloss textures to accordingly to show the reflectivity or the non reflectivity of these panels.

Kind Regards

Andy
Just connect mapping node and texture co-ordinate node to your image texture as shown in screenshot below and scale the texture to your desired size