Exterior door sill/jamb thickness
What governs the thickness of the sill/jambs on exterior doors? I have outswing french doors and the sill area on the inside of the door is higher than the finished floor level. I don't want the sill to show on the inside. I was going to make a p-solid and make the material the same as my interior floor to fill the area between the finished floor and the doors and was hoping I could make the sill thinner (lower than the finished floor). I know I could lower the entire door unit to get the sill below the level of the finished floor--but. Am I going about this in the "correct way"? All help is always deeply appreciated.