Poster placement

I will be placing my poster in a film magazine, this means the dimensions of my poster will be around 8.5x11". I thought this would be a good place to advertise as the poster will be fairly detailed and so would require more time to look at, it is not quite 'eye-catching' enough for a billboard poster. Also being a niche genre film means that it would require a lot of finance to advertise over billboards and such, so a slot in a magazine would be easier financially.