gas line size is based on the distance from the meter and other installed appliances. There are no rule of thumb sizing ideas that will work for sure because each application is different.. If you are using the dryer you can't put the stove on the same pipe. as you will have insufficient gas for either if the other is working and it will be against manufactures and code requirements. Your utility should be able to give you input.
If you don't want to know, Don't ask
If I could come back as anyone one in history, It would be the man I could have been and wasn't....