How to Buy Secondhand Clothing Online and Actually Get the Fit Right

The single biggest reason people hesitate to buy secondhand clothing online is fit. You cannot try it on, the size label is often from a decade when sizing meant something different, and the piece is one of one, so there is no swapping it for the next size up.

All of that is manageable, and it comes down to one habit: stop shopping by size and start shopping by measurement. Here is how to do it properly.

Why vintage sizing does not match modern sizing

Clothing sizes have drifted enormously over the past sixty years. The same number printed on a label has been attached to steadily larger garments over time, a phenomenon usually called vanity sizing. The practical result is that a vintage size 12 can measure closer to a modern size 6, and the gap widens the further back you go.

Brand-to-brand variation makes it worse. Two garments made in the same year by different manufacturers can differ by several inches at the same nominal size. There is no conversion chart that reliably solves this, which is why every serious resale buyer eventually abandons size labels altogether.

Measure one garment you already own and love

This is the single highest-value thing you can do, and it takes about five minutes.

Find a garment you already own that fits exactly the way you want. Lay it flat on a table, smooth it out, and measure it flat — not around your body. Write the numbers down and keep them in your phone. From then on, you are comparing garment to garment rather than guessing against a label.

Do this for each category you buy: one shirt, one pair of pants, one jacket, one dress. Four sets of numbers cover most of a wardrobe.

The measurements that actually matter

You do not need a full tailor's chart. For most purchases, a handful of numbers decide whether a piece works.

• Tops, shirts and jackets: pit-to-pit (armpit seam across to armpit seam), shoulder-to-shoulder, sleeve length from shoulder seam, and total length from the base of the collar.
• Pants and jeans: waist measured flat across the top and doubled, rise from crotch seam to the top of the waistband, inseam, and leg opening.
• Dresses and skirts: pit-to-pit, waist flat, hip at the widest point, and total length.
• Coats: the same as jackets, but check pit-to-pit against a garment you would wear underneath, not against a t-shirt.

Two numbers do most of the work: pit-to-pit for anything worn on top, and rise for anything worn on the bottom. Rise in particular is what makes vintage jeans feel wrong on modern bodies — not the waist measurement.

Know which way each fabric will move

A measurement means different things depending on what the garment is made of, and this is where most online returns come from.

Rigid cotton denim with no elastane will not give at all across the hip, but it will relax roughly half an inch in the waist after a few wears. Wool has some natural recovery and will ease slightly across the shoulders. Knits and jersey stretch and then return, so a snug measurement is usually fine. Woven silk, linen and rayon do not stretch meaningfully at all — whatever you measure is what you get, permanently.

The practical rule: with anything woven and rigid, buy to the measurement or slightly above. With knits, you have a little room. Never count on a rigid woven fabric to "give."

Read the flat-lay photos, not the model shot

When a resale listing shows a garment laid flat, that photograph carries more information than a styled shot does. You can see the true shoulder line, whether the waist is genuinely nipped or straight, how the leg tapers, and whether the garment hangs square or has been reshaped by years of wear.

Look specifically at the shoulder seam position on jackets and the knee break on pants. Those two details tell you how a piece will sit on a body far more reliably than a photograph of someone standing in it.

Plan for a tailor on anything structured

Secondhand buying gets dramatically easier once you accept that some pieces will need a small alteration, and budget for it.

Sleeve length, hem length, and taking in a waist are all inexpensive and quick. Shoulders are expensive and often not worth it. So the rule for jackets, coats and blazers is simple: buy for the shoulders, alter everything else. A coat that fits perfectly across the shoulders and is too long in the sleeve is a good purchase. One that fits in the sleeve and is too wide in the shoulder is not.

This is exactly why secondhand tailoring works out cheaper than new: a well-made vintage coat plus an alteration frequently costs less than a mediocre new one, and fits better afterward.

Buy the well-made piece when you are unsure

If you are genuinely torn between two options, favor the one with better construction. Quality secondhand pieces hold their resale value, so if it does not work out, passing it on costs you very little. A cheap piece that does not fit is simply a loss.

This is the underrated advantage of resale: the downside of being wrong is small, which is what lets you take more chances than you would at full retail.

Secondhand fit questions, answered

How do I measure a garment flat?

Lay it on a flat surface, smooth out wrinkles without stretching the fabric, and measure straight across in a single line. For chest, measure from armpit seam to armpit seam and double it to get the full circumference. Always measure the garment, never your body, when comparing against a listing.

What if the listing does not include measurements?

Ask. Any resale seller who takes the work seriously will measure a piece on request, and a seller unwilling to do so is telling you something useful about how the rest of their listings are described.

Should I size up when buying vintage?

Not as a rule — size up relative to the label, but not relative to the measurements. The label is unreliable in both directions. Once you are working from pit-to-pit and waist measurements, the question disappears entirely.

How much ease should I allow?

For a fitted shirt, one to two inches over your own chest measurement. For a relaxed shirt or a sweater, three to four. For a coat worn over a sweater, four to six. Ease is a style decision as much as a fit one, which is another reason measuring a garment you already like beats measuring yourself.

Can I return secondhand clothing that does not fit?

Policies vary by seller, so check before you buy rather than after. The more reliable protection is simply doing the measurement work up front — it removes most of the risk before money changes hands.

Start here

We list measurements because sizing labels on secondhand clothing genuinely cannot be trusted. Take five minutes to measure one shirt, one pair of pants and one jacket you already love, and buying resale online stops being a gamble.

Then browse the full women's and men's collections, or start where fit matters most — women's outerwear, men's blazers and suits, and women's jeans. We are based in Austin, Texas and ship across the United States.