Meta Title Text

Hello

I'm confused about using | or a comma or neither in my meta title text.

What do you think is the best from the three options below and why?

1. Black | Mens | Leather | Shoes | Paul Smith | Slip On | Size 13
2. Black, Mens, Leather, Shoes, Paul Smith, Slip On, Size 13
3. Black Mens Leather Shoes Paul Smith Slip On Size 13

If you think all the above are inappropriate, I would welcome suggestions.

Thanks in Advance from a SEO novice.

You should use commas in Meta tags.