It would depend on what the form contains. You don't want the form to look too sparse or too cramped.
Keep in mind that we only know what you tell us. It's best to say what you actually mean rather than assuming that we will read between the lines.I hear that.. But what I'm really driving at is with regard to screen resolution and how the forms display at various resolutions. My app will mostly be run on laptop computers attached to flow benches. Personally I run 1366 x 768. There are going to be guys that run perhaps 1024 x 768...or even different. Short of switching your screen resolution as you develop your forms, do you target a specific resolution as "standard"...if there is in fact a standard anything these days??