SKU numbers

I'm preparing to get my products onto an additional online venue. They want SKU numbers. SKU stands for shop keeping numbers. This is going to require some thought as to what scheme I'm going to use.

So I logged all of my products and I'm thinking about that. Since all of my products look unique unless they are made of a solid color tarp, they will each need unique numbers.

On this spreadsheet I put pictures onto the description by formatting the comment code to a picture. When I mouse over the cell, I see a picture of the product.

Update: well, they stopped responding to my emails. If an ethical business does that, are they still an ethical business?