Packaging to ship magazines?

I'm hoping everyone's experience shipping comics will translate into what we're trying to do. In March, we plan to launch a campaign to crowdfund a print edition in the style of the old STARLOG magazine.

Now, a lot of comics creators have shipped, and I know a lot of you are big on the Gemini mailer. What's the best equivalent for magazine (A4) size books? I've found what I *think* is what we'd need to use, but I'm looking for suggestions to backstop my own research.

Also, if you were going to back a STARLOG type of genre magazine:

1. What would you want to read in it?

2. What perks would you suggest to go along with the book?

Thanks in advance.

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