It’s that time again… which of these font sizes is the smallest one you are comfortable reading?

This is font size one. This is font size one. This is font size one. This is font size one. This is font size one.
This is font size two. This is font size two. This is font size two. This is font size two. This is font size two.
This is font size three. This is font size three. This is font size three. This is font size three. This is font size three.
This is font size four. This is font size four. This is font size four. This is font size four. This is font size four.
This is font size five. This is font size five. This is font size five. This is font size five. This is font size five.
This is font size six. This is font size six. This is font size six. This is font size six. This is font size six.
This is font size seven. This is font size seven. This is font size seven. This is font size seven. This is font size seven.