Old style figures, also known as non-lining figures do not line
up on the baseline as regular or lining numerals do. They can be
found in various fonts. If the body text has a significant amount
of numbers, research a font family where they are included. If
non-lining numerals are not available, use a slightly smaller point
size for the lining numbers. Think of lining numbers as upper
case numbers and non-lining numbers as lower case numbers.