I don't tend to use any particular size of embroidery pattern. Thanks for the compliment on planning but I really don't do much planning ahead! lol I just start doing the embroidery (because it takes so long) and then decide what I am going to do as I go along. Once the blocks are embroidered, I take a look at them and try to decide what finished size they would look best in. On the rare occasion that I do know exactly what I want to do, something happens and the plan changes!!! So really, I just do the embroidery and wing the rest! I have done embroidery patterns that are roughly 4" right up to the latest quilt top that I just completed with an 8x10" embroidery.
Sorry I can't be of more help to you but like I said, I normally just wing it and hope for the best! lol