Protective cover and/or bags for hardcover library editions help.

Hello guys and girls of the comic book world! I tried asking this question in the Hellboy Subreddit but I was told to come here as I might receive more help.

So I am looking for help looking for some type of plastic or other material (I really only know of the BCW modern size bags I currently use for my comic books) type of bags or covers to help protect my Library Editions of the Hellboy series as they are beautiful books and while I don't want them to collect dust sitting on my shelf and wouldn't mind the look of them sitting in a bag if it meant they weren't being covered in dust.

I picked the thickest book for these dimensions and they are all the same height. 9.3 x 1.6 x 12.3 inches.

Any help in the right direction to protect these beauties would be much appreciated! And hopefully it can help others looking to protect their bigger versions of comic books :)