> I just wondered what sizes are allowed/valid in WP7 apps?
The WP7 SDK currently only supports 320 x 50 banners.
A couple of things.
First I should correct myself. While the creative may actually be 320 x 50 – as seen by the advertiser and on the other platforms – on WP7 BannerAd's size is always 480 x 75. This is why the graphic appears slightly enlarged.
> So what will happen if the ad container size is different? The ad will scale to fit, or just cut off?
BannerAd should always render itself at precisely that size. It will not scale.
Hope that helps...
> Or I have to have a ad container at size of 480x75?
Yes – otherwise you'd be mis-presenting the ads, which would be very bad [smile]...