A second-hand wool coat can be a lovely September find: substantial enough for the colder days ahead, with a shape you might never spot on the high street. The useful question is whether this particular coat will work with your clothes and your routine. Give yourself time to check it from shoulder seam to hem before its colour or beautiful buttons make the decision for you.

Measure a Coat That Already Fits Well

Begin at home with a coat you comfortably wear over a jumper. Fasten it, lay it flat without stretching it and measure across the chest just below the armholes, across the shoulders, along the sleeve and down the back. Note exactly where each measurement starts, especially for sleeves, because sellers may measure from either the shoulder or the collar.

A flat chest measurement is useful for comparison, but it does not tell you everything about movement. A fitted coat with high armholes will feel different from a loose style with dropped shoulders, even when both have the same width. Treat the label size as a starting point rather than a promise.

Try the movements you actually make

In a shop, wear or bring your usual autumn layer. Button the coat, reach forward as though holding a steering wheel, cross your arms and sit down. Check that the collar stays comfortable and the front does not pull into diagonal creases.

• Let your arms hang naturally to judge sleeve length.
• Put your hands in the pockets without lifting your shoulders.
• Walk a few steps to see whether the hem allows your normal stride.

For an online purchase, request the missing measurements before buying. A photograph of the coat laid flat can also help you understand its proportions.

Read the Fibre Label Carefully

Look for the composition of the outer fabric, then read the lining separately. A coat described simply as wool may contain a mixture of fibres, and the lining will usually have its own composition. Ask for a clear label photograph if the listing gives only a broad description.

A high wool percentage is one useful detail, but warmth also depends on fabric thickness, weave, fit and construction. A thin wool coat with an open neckline may feel less protective on a breezy walk than a denser blend that closes neatly. Run the fabric gently between your fingers to judge its substance rather than deciding from the percentage alone.

Read the care label at the same time. Think about whether you are happy with the cleaning method and how often the coat is likely to need it. Pale cuffs and a long hem can demand more attention if you use public transport or walk along muddy lanes.

If the label is missing, leave the composition as unknown. Softness, weight and a seller’s guess cannot establish exactly what the fabric contains.

Inspect Cuffs, Collar and Underarms

These areas show how the coat has been worn. Turn back the cuffs, lift the collar and look beneath each arm in good light. Compare them with a sheltered patch inside the front opening: differences in colour, thickness or texture are easier to see when you have a reference.

A few surface bobbles are different from fabric that has worn thin. Pilling sits above the cloth; thinning leaves it flatter, weaker or more open. Do not assume every rough patch will disappear with a fabric shaver, particularly on a textured or loosely woven coat.

Check the sleeve edges for fraying and the collar for shiny, flattened areas. Under the arms, look for discolouration, stiff patches and strained seams. Also inspect where a shoulder bag might have rubbed against the side, since repeated friction can leave a surprisingly narrow strip of wear.

Step back as well as looking closely. Uneven fading across the shoulders or one sleeve may be subtle in a detail photograph yet obvious when the whole coat is hanging up. Decide which signs of age you enjoy and which would bother you every time you put it on.

Check Lining, Pockets and Fastenings

Open the coat fully and work around the lining, starting at the neck and finishing at the hem. Pay attention to the underarms, sleeve openings and centre back, where movement puts pressure on seams. A small split along a seam is a different repair from cloth that tears when handled gently.

Slip your hand into every pocket. Feel for holes, detached corners and anything caught between the lining and outer fabric. Check that pocket openings are secure and that any decorative flaps lie evenly. On a long coat, make sure the lining does not hang below the hem or pull the outer fabric upwards.

Fasten everything once

Close every button, zip, hook and press stud. Look at buttonhole edges for stretching or broken stitching, and check the fabric behind each fastening. A loose button may need only a few stitches, but a torn area supporting it can be more involved.

Count matching buttons, including any spare inside. If the style has a belt, confirm that it is included and inspect its loops. An absent belt can change both the silhouette and the way the coat closes.

Look for Holes, Odours and Previous Repairs

Examine the fabric in small areas rather than giving it one quick glance. Look along folds, beneath lapels and around the lower back. Holding a section towards daylight can reveal thin spots, though the lining may prevent light passing through the whole garment.

Small holes deserve attention even if they are hidden. Ask whether the seller knows their cause and look for other affected areas. If you see signs of active insect damage, leave the coat behind rather than bringing it into your wardrobe.

Notice the smell before perfume or a busy shop distracts you. Persistent smoke, damp or heavily fragranced fabric can be difficult to judge from a distance, and cleaning is not a guaranteed cure. When buying online, ask directly about noticeable odours and storage conditions.

Previous mending is not automatically a drawback. Inspect patches and stitched repairs for puckering, tightness or a colour mismatch you would dislike. Look inside shortened sleeves and hems too: an uneven alteration may affect how the coat hangs. Useful listing photographs include the full front, back, lining, labels and each disclosed flaw.

Add Cleaning and Alterations to the Price

Work out the likely total before deciding that the coat is a bargain. Include delivery, cleaning, missing buttons and any alteration you would need immediately. For a repair that determines whether you can wear it, get a quote based on clear photographs or an in-person assessment before committing.

Buy the fit you can wear now wherever possible. Adjusting a sleeve may be straightforward on one coat and awkward on another because of vents, buttons or decorative stitching. Changing shoulders or reshaping the whole body is a much bigger undertaking than taking up a simple hem.

For online shopping, read the seller’s stated returns arrangements and factor in any return postage. Keep the listing details and your measurement notes together so you can assess the coat promptly when it arrives.

The right find does not need to look untouched. It needs sound fabric, comfortable movement and a manageable amount of care. When those things line up, you can welcome a little character and start planning the autumn outfits you will actually wear.