Is this ok leather for strop making??

I've got some lengths of light blue leather, around 4mm thick and between 2&1/2 - 3 inches wide.

(Is light blue leather chrome tanned??)

Would this be ok for making a hanging strop? It would be pretty sturdy.

Cheers.

I don't think the color matters but the surface does.
It must be smooth.
What animal is it from?

I think its smooth.

I'm guessing it'll be cow leather.

So the main issue is that it is a smooth surface that can be kept flat?

In my opinion, yes.

I'm pretty sure this is chrome tanned leather - that shouldn't be an issue for stropping should it?? As long as surface is smooth?