CSI Miami Season 1-8

The ones from Meritline.com are the ones I use. The only thing that sucks is that most of the CSI lastely have 7 discs. The discs are snug so there is no danger of scratching. This is why I am looking for 14mm size covers for Alias seasons. I have found a cover for season 5, but need 1-4.

What size is the 1 inch cover? 22mm, 25mm or 27mm. I have seen covers with all of those size spines.