Flat Front Trousers.

The flat-front trouser looks clean and simple. It is neither. The absence of pleats means there is no excess cloth to manage variations in the waist-to-seat ratio — the trouser must be cut precisely to your specific measurements, or it will either pull across the seat and hips or hang loosely and inelegantly. This is the primary reason that flat-front trousers from off-the-rack rarely fit well. They are made to a standard hip-to-waist ratio that is almost certainly not yours.

A bespoke flat-front trouser is cut from a pattern that begins with your measurements — your actual waist, your actual hip, your actual rise (the distance from waistband to crotch), your actual thigh circumference. The result is a trouser that sits flat across the stomach without pulling, travels cleanly through the seat without bunching or drooping, and drapes through the thigh and knee without twisting.

The break — the amount of cloth that folds over the shoe — is set at the fitting to your preference. A clean no-break is the contemporary standard. A half-break — a slight fold at the front — gives the trouser more visual length. A full traditional break is appropriate on more formal or classically styled trousers.

Flat-front trousers are made in virtually every suiting and trouser cloth. In a matching suit, the cloth is determined by the jacket. As an odd trouser — worn with a separate jacket or blazer — the choices are broader.

For professional wear, a medium-weight worsted in grey, charcoal or navy is the most versatile choice. A slightly heavier flannel trouser in mid-grey is the classic choice for wearing with a tweed or herringbone jacket. A linen or lightweight cotton trouser in stone, cream or pale blue is the warm-weather alternative, appropriate with a linen or cotton blazer. A cavalry twill in tan or mid-brown is a robust choice for the odd trouser that needs to work hard.