
The terms “khakis” and “chinos” are often used interchangeably, though the correct word is actually chino, which applies to the actual pants themselves.
Khaki is, arguably, the most common color of chinos – which is probably why the terminology gets confusing.
So khakis are chinos, but chinos aren’t necessarily khaki-colored.
The stylistic differences between a “formal” pair of chinos and a “casual” pair are slight.
Formal chinos tend to look like dress trousers, except they’re made of cotton twill instead of wool. Look for extended tab waistband closures, front slant pockets, back welt pockets with button closures, optional pleats, center creases, and cuffs.
Casual chinos tend to look like your favorite pair of denim – standard side pockets, back patch pockets, rivets or bar tacked stress points, flat felled seams, and standard hem.