John K Jordan
I also like to use 1/8" on either side. At my last house I installed custom oak doors throughout the interior and used solid oak to build all frames and stops (plus baseboard, window frames, sills, etc.) I liked the look and never had any seasonal issues. The guy who bought the house when we moved said the doors sold him on the house. He was very particular about his doors and all these closed with a gentle "snick."