different sizing options in resolve..

Could someone chime in and explain the difference between the various sizing options in resolve colour tab.
Edit, input, output,node and reference sizing.

Much appreciated

Search for "Image Scaling" in the Resolve User Manual.

Could someone chime in and explain the difference between the various sizing options in resolve colour tab. Edit, input, output, node and reference sizing.

This is all covered in the manual, which I strongly recommend that you read.

Edit sizing is a clip image transform done on the Edit page. Input sizing is done entirely on the Color page, also clip-by-clip. Output sizing affects the entire project (or at least per keyframe) as a global correction. Node sizing affects the size and position within an individual node. Reference sizing only affects the size of the Gallery stills.