Petticoat vs Peacoat: What a Petticoat Actually Is (and Why You're Confused)

Updated October 2026 by the MsDressly editorial team.

What a petticoat looks like

A petticoat is a light, skirt-shaped garment worn underneath a dress or skirt. It sits at the waist and falls to somewhere between the knee and the ankle, depending on the outer garment it supports. Traditional petticoats are slip-like and smooth, while modern versions are gathered or tiered to add structure and fullness.

Visually, a petticoat on its own looks like a simple A-line or full skirt — which is why some shoppers assume it's outerwear and search for a "petticoat jacket." Its defining job is what happens underneath: it gives skirts and dresses their swing, prevents cling, and adds a layer of coverage under sheer fabrics.

Why people search "petticoat jacket"

The phrase "petticoat jacket" is almost always a search mix-up between two unrelated words: petticoat and peacoat. They sound similar, but a petticoat is an under-layer skirt, while a peacoat is a structured, double-breasted wool coat with a wide collar — classic outerwear, not underwear.

If you typed "petticoat jacket" or "petticoat vs peacoat," this guide covers both garments so you can find the one you actually want.

Petticoat vs peacoat: the key differences

• Purpose: a petticoat is worn underneath clothing; a peacoat is worn over everything as a winter coat.
• Construction: a petticoat is soft, light, and unstructured; a peacoat is heavy, tailored, and double-breasted with anchor-style buttons.
• Fabric: petticoats use cotton, tulle, or chiffon; peacoats use thick wool or wool blends.
• Where it sits: a petticoat hangs from the waist down; a peacoat covers the torso to about hip or mid-thigh length.

In short: one shapes your skirt from below, the other keeps you warm from the outside. If you're after outerwear, browse our oversized jacket collection for relaxed layering options.

How the term "petticoat" is used today

Historically, "petticoat" described any skirt worn as an under-layer, and for centuries it was a standard part of a woman's wardrobe. Today the word survives mainly in two contexts: formal and bridal wear, where structured petticoats create volume under gowns, and vintage-inspired fashion, where full petticoats give swing skirts and midi dresses their classic shape.

Modern usage has also loosened — some retailers label full, tiered skirts as "petticoat skirts," blurring the line between undergarment and outerwear. That's another reason the search term gets tangled.

Variations and related styles

• Slip petticoat: a smooth, bias-cut layer that prevents see-through fabric from revealing anything — closest to an everyday slip.
• Crinoline or hoop petticoat: a stiffened or structured version that holds a skirt out dramatically; common under wedding and ball gowns.
• Half-slip: waist-down only, versus a full slip that also covers the torso.
• Peacoat: the coat people often mean when they type "petticoat jacket" — a short, double-breasted wool jacket.

Fabrics and construction details

Petticoats are built from light, smooth, or structured fabrics depending on the job. Cotton and cotton-linen blends breathe well for everyday layering; tulle and netting create dramatic volume for formal skirts; chiffon and charmeuse glide under silk or satin without catching.

Look for a comfortable waistband (elastic or smooth satin), a hem finished flat so it doesn't show through, and a length slightly shorter than your outer skirt. For the coat side of the confusion, a peacoat should be heavyweight wool with a lined interior and secure double-breasted closure.

How to wear a petticoat

Style your petticoat to match the outer garment's length and weight. A-line and full midi skirts drape beautifully over a softly gathered petticoat; a sleek slip-style petticoat works under bodycon or pencil silhouettes where you want smoothness, not volume.

For visible, skirt-like petticoats — tiered or full versions worn as the main garment — treat them like statement midi skirts. Pair with a fitted knit top to balance the volume, or go full vintage with a tucked blouse. A petticoat or full skirt in a cotton-linen blend, like this chambray button-front A-line maxi, delivers that swingy shape on its own.

Petticoats work on every body type because their whole job is adjusting proportion under the clothes you love — choose fullness based on the look you want, not any rule about what you "should" wear.

How to shop for one

Start by deciding which garment you need. If you want volume or coverage under a dress, search for "slip," "half-slip," or "crinoline" — that's the petticoat family. If you want a warm double-breasted coat, search "peacoat" or browse our jacket collection.

If you love the full-skirt look itself, skip the under-layer entirely and shop ready-to-wear statement skirts — a smocked chiffon maxi like this leopard print tiered style gives you built-in movement. Orders ship free when you buy 2 or more items, or on orders over US$80.