These are 1/200 scale. I felt the size is fine for N, and I really don't think they would be too bad for HO if you have them on piano wire up in the air. These were easy to paint. I've never attached piano wire to models before, and could not find a glue in my stash that was up to the job. I finally plugged in my soldering iron, carefully melted a very small section under the plane, and stuck a piano wire bent 90* at the tip into the melted plastic. Easy peasy. I used 4 of the six against the Godzilla wreaking havoc on my layout. The other two I painted as normal planes, and they fit right in.