Because my pillow insert was 14″ by 28″ inches I drafted my pillow case size to be 16″x 30″. I do admit for a longer pillow the very loose fitting look is a bit much. If I were to redo this I would probably only go 15″x 29″. That way it would still be loose but not slouchy like mined turned out. I don’t mind it too much I love how it looks lived in.