The Halfpage HPTO consists of a 300×600 banner including two panels that are served automatically out of the halfpage tag.
The voetbal.nl takeover consists of a rectangle, with the size 336px(w) × 280px(h) and three panels, left and right, with the size 420px(w) x 1280px(h) and a top panel with the size 728px(w) x 90px(h).
The Eisma takeover consists of a 1×1 pixel that automatically serves the wallpaper/skin on the page. The panels are 145 pixels wide and 650 pixels high.
The XGN HPTO consists of a Billboard with dimensions 970×250 and will automatically serve a wallpaper. Please make sure that the background of the skin is fully covered so that the skin will also be compliant on smaller resolutions. Please find an example here
Yes, that's correct some templates are not available online for diffrent reasons. They are still officially in beta or being re-enginered.