A corset is a boned, laced garment built to shape your waist. A bustier is a lighter, cropped top that lifts the bust and stops at or above the waist. Choose a corset for shaping and a bustier for support and style. Either way, size by your natural waist and lace gradually.

By the Badd Kitty boutique team · Updated October 2026

Key takeaways

• Corset vs bustier: corsets cinch the waist with boning and laces. Bustiers support the bust and do little shaping.
• Overbust vs underbust: an overbust covers the bust. An underbust starts below it, so you wear it with a bra or over a top. A waspie is a short band around the waist only.
• Boning: spiral steel shapes and lasts. Plastic or acrylic boning is lighter and right for fashion and costume corsets.
• Sizing: measure your natural waist. Beginners should choose a corset 2–4 inches smaller than that measurement.
• Comfort: you should always be able to breathe deeply and sit down. Numbness, pain or dizziness means loosen it now.

Corset vs bustier: what's the difference?

The word corset comes from Old French cors, "body", plus a diminutive ending (Dictionary.com). In English, the stiffened, laced underbodice was long called "stays" (Etymonline). Bustier is a much newer French borrowing from buste, and originally meant an undergarment tailored to the bust (Dictionary.com). The names tell you what each one does: a corset works on the body and a bustier works on the bust.

Overbust, underbust and the waspie

An overbust is the classic shape, with a sweetheart or straight neckline. The Lavish Black Lace Corset ($117.95) is a good example: black floral lace over satin, a curvy cut and a lace-up back, in sizes S to 3XL.

An underbust leaves your bust free, so you choose the bra. It is the most versatile corset to style over a shirt or dress. The Lavish Red Underbust Corset ($104.95) has black lace over red satin, a hidden front zipper, 8 plastic bones with 4 steel bones at the back, a privacy panel and garter loops. Browse more in underbust corsets.

A waspie (also called a waist cincher) is the shortest of the three. Our Top Drawer Black Steel Bone Mini Cincher ($119.95) is the most structured piece we carry: 8 spiral steel bones plus 4 static bones at the front and 4 at the back, a front clasp closure and a cotton twill lining.

Shop corsets & bustiers

How a corset is built

Steel vs plastic boning

Bones are the narrow strips sewn into channels that give a corset its structure. Spiral steel flexes front to back and side to side, so it follows your curves and can take real waist reduction. Flat steel is stiffer and is used at the back and the busk. Plastic or acrylic boning is lighter, cheaper and comfortable for a night out, but it can bend and stay bent under tight lacing. Most fashion and costume corsets use plastic bones, and that is fine for a look rather than serious shaping. Historic corsets used whalebone, which the V&A describes as "strong yet flexible" (V&A, red serge corset, 1883).

Busk closure

The busk is the front fastening: two flat steel strips, one with loops and one with studs, that hook together. It lets you get in and out without unlacing the back. The V&A notes that the front-fastening "split busk" was invented in 1829 but did not become common until the 1850s, and that it meant a woman could dress without help (V&A, corset, 1864). Today's alternatives are front zips, front clasps and side hook-and-eye closures.

Modesty panel, grommets and laces

A modesty (or privacy) panel is a strip of fabric behind the back lacing that covers the gap between the two edges. Grommets are the metal eyelets the lace runs through. Look for metal grommets set firmly into the fabric, because they take all the strain when you tighten.

How to measure for a corset

1. Find your natural waist. It is the narrowest part of your torso, usually an inch or two above your belly button. Bend to one side and it is where the crease forms.
2. Measure snugly with a soft tape, standing relaxed. Do not suck in.
3. Measure your underbust and hips too. An underbust must clear your ribs, and a long corset must clear your hips.
4. Subtract 2–4 inches for your first corset. A 32-inch natural waist usually means a 28- to 30-inch corset. Beginners should not size down further.
5. Check the brand's chart. Many fashion corsets use S to 3XL instead of waist inches, and some, like Shirley of Hollywood, use numbered sizes from 32 to 38.

When a corset is laced to fit, expect a gap of about 2 inches at the back, with the two edges running parallel. If the gap is wide at the top and closed at the bottom (or the reverse), the shape does not match your body, so try a different cut. Fit matters more with corsets than anything else we sell, which is why our boutiques welcome try-ons. Find your nearest one on the store finder.

How to lace up a corset

1. Loosen the laces fully so the back opens wide, then fasten the busk or zip at the front. Work from the top down, or from the middle out if the busk is stiff.
2. Find the bunny ears. Most corsets are laced in X's from the top and bottom toward the waist, with two long loops left at the waistline. Those loops are the "bunny ears".
3. Tighten from the top down. Pull each X snug in turn, working toward the waist, and feed the slack into the loops.
4. Tighten from the bottom up in the same way.
5. Pull the bunny ears out to the sides. Do this gently, in two or three rounds a few minutes apart, so your body settles between each one.
6. Tie a bow and tuck the ends inside the top or bottom edge.

To take it off, loosen the laces first, then open the busk. Unhooking a busk under full tension strains the studs.

Seasoning (breaking in) a corset

A steel-boned corset needs breaking in, much like new shoes. For the first week or two, wear it for an hour or two at a time, laced only snugly, with no more than an inch or two of reduction. The fabric relaxes and the bones warm and settle to your shape, so the corset will be more comfortable and last longer. Plastic-boned fashion corsets need no seasoning.

How tight is too tight?

A corset should feel like a firm hug, not a squeeze. Cleveland Clinic warns that tight waist compression presses on the ribs and sternum and can make breathing harder. It can also worsen acid reflux and cause digestive discomfort. Its advice is occasional wear for a few hours, not overnight or on consecutive days (Cleveland Clinic). History agrees. The V&A records that as awareness of the damage caused by corsets grew, makers redesigned them and advertised plenty of "spurious" health claims (V&A, ventilated corset, 1890–1900). Even in the 1860s, a small waist was often an illusion created by a wide crinoline skirt rather than tight lacing (V&A).

Our rule in the boutiques: you should be able to take a full breath, sit and eat a little. Loosen it straight away if you feel tingling, numbness, pain, dizziness or heartburn. This is general information from a retailer, not medical advice. If you are pregnant, or have reflux, heart or lung conditions, ask your doctor before wearing a corset.

Corset tops vs lingerie corsets

A corset top is fashion: lighter boning, often a zip or hooks, cut to wear with jeans, trousers or a skirt. A lingerie corset is built for the bedroom or boudoir, often with garter straps and a matching G-string. The Shirley of Hollywood Fishnet Corset ($102.95) has a metal busk, lace-up front and back, and removable garters. Many also work as tops: try a black lace overbust with high-waisted trousers and a blazer. If you want lift without the cinch, choose a bustier such as the Blue Blossom Bustier ($74.95), which has soft underwire cups, adjustable front garters and sizes S to 3X/4X.

Shopping by colour? Start with black corsets, red corsets or lace corsets. Add a garter belt and thigh-high stockings for the full pin-up line.

Shop black corsets

How to care for a corset

• Air it out after every wear by hanging it over a chair, inside out, before you put it away.
• Spot-clean with a damp cloth and mild soap. Most corsets should never go in a washing machine or dryer.
• Follow the label. The Lavish Red Underbust is dry-clean only, and the Top Drawer Mini Cincher is hand-wash only.
• Store it flat or loosely rolled, with the laces loosened, away from heat that can warp plastic bones.

New to lingerie terms? Our guides on what lingerie is and the teddy vs chemise vs babydoll cover the rest of the wardrobe. Orders ship in plain packaging, with free standard shipping over $75.

Sources

1. Dictionary.com, "corset": origin
2. Online Etymology Dictionary, "stays"
3. Dictionary.com, "bustier": origin
4. Victoria and Albert Museum, Corset, 1864 (front-fastening split busk)
5. Victoria and Albert Museum, Red serge corset, 1883 (whalebone, spoon busk)
6. Victoria and Albert Museum, Ventilated corset, 1890–1900
7. Cleveland Clinic, "Waist Trainers: What You Should Know"