The screen resolution is 800 by 600 so there is the size you could use?

However, try http://maemotalk.com/2009/09/18/offi...nterface-docs/

There are three links on the main screen, Hildon 2.2 UI Style Guide, Hildon 2.2 Widget UI Specification and Fremantle Master Layout Guide.

They all link to Nokia spec sheets.

You also have a thread: http://talk.maemo.org/showthread.php?t=31832

Hope that helps.