Quick Answer: A straight-leg pant creates one continuous vertical line from hip to hem, while a skinny pant’s tapering shape draws the eye toward the narrowing ankle and interrupts that line — the uninterrupted vertical of a straight leg often reads as longer than the fitted-but-tapered alternative.

Skinny pants get marketed as the automatic leg-lengthener, but the actual visual mechanics often favor a straight leg instead.

Why would a looser fit read as longer than a fitted one?

Elongation is about line continuity, not tightness — a straight-leg pant maintains the same width from thigh to ankle, creating one unbroken vertical line, while a skinny pant’s gradual taper introduces a visual narrowing that the eye reads as a stopping point rather than a continuation.

Does this depend on where the pant hits the shoe?

Significantly — a straight leg that breaks right at the top of the shoe, with minimal pooling, maximizes the effect, while excess fabric bunching at the ankle undercuts it. The line only elongates if it stays clean all the way to the shoe.

Does heel height change which style works better?

With a heel, both styles benefit from the added length, but a straight leg with a slight break at the shoe tends to maintain its line better than a skinny pant, which can look overly tight against the ankle once elevated by a heel.

Is this true for petite frames specifically?

Yes, often more noticeably — petite frames benefit disproportionately from unbroken vertical lines since there’s less overall leg length to work with, making the continuity of a straight leg more valuable than the closeness of a skinny fit.

Does color or pattern interact with this effect?

A single solid color down the length of either style reinforces the vertical line, while a contrasting cuff or pattern break can undercut a straight leg’s advantage by reintroducing a visual stopping point partway down.

TL;DR:

• Elongation depends on line continuity, not how fitted the pant is
• A straight leg with a clean hem break maximizes the vertical effect
• Petite frames often benefit more from this than from a tighter fit
• A solid color reinforces the line; contrasting details can interrupt it

Fit and length matter more than the ‘skinny equals longer’ assumption most people default to.