Help with tyre size please

[steveindenmark]

37-622 | 28x1 3/8x1 5/8"

Does this equate to a 700 x 37 or a 700 x 35 or neither?

 

[Poacher]

700c x 37, probably. https://sheldonbrown.com/tire-sizing.html

 

[Elybazza61]

700 x 35c

From Schwalbe website;

https://www.schwalbe.com/en/groessenbezeichnung

And Cycling uk;

https://www.cyclinguk.org/cyclists-library/components/wheels-tyres/tyre-sizes

 

[presta]

37-622 | 28x1 3/8x1 5/8"

Does this equate to a 700 x 37 or a 700 x 35 or neither?

The marking on the sidewall of my Marathons is: "622-37, 28x1.40, 700x35C"

I wouldn't get too preoccupied with width though, the tolerances are large enough to take a 35mm tyre from 32mm to 38mm:

I hadn't noticed just how large the tolerances are until I saw the difference in these two 35mm tyres: