How to Spot Quality Before You Buy: A Tailor's Guide

You've bought the £8 top that pilled after one wash. You've also bought the "investment" jumper that stretched out by week three. Price doesn't predict quality - construction does.

At The Seam, we spend our days taking clothes apart: altering them, repairing them, letting out seams that were never meant to be let out. We see what's actually inside a garment more than almost anyone.

Here's what you should look for before you buy:

1. Feel the fabric before you check the label

Scrunch it in your hand. Good fabric springs back within a second or two. If it stays creased, the fibres are short or poorly spun - and that same weakness is what causes pilling later.

Hold it up to a window. Light passing through easily usually means a lower gsm (grams per square metre) - the industry's actual measure of fabric weight. For reference: a quality cotton T-shirt typically sits around 180–220gsm; anything noticeably thinner is cutting fabric cost, and it'll show at the shoulders and hem within a few months.

Watch for sheen. Genuine cotton and wool reflect light unevenly - that's the natural variation in the fibre. A uniform plastic-y shine usually means a synthetic blend doing the shape-holding a natural fibre should be doing on its own.

Fibre content on the label is not a quality guarantee. Two "100% cotton" T-shirts can differ enormously depending on the cotton (long-staple vs short-staple), the weave, and the finishing. This is the single most common myth we correct.

2. Turn it inside out - this is where look first

When something comes into The Seam for alteration, the inside tells us in ten seconds whether it's worth the work.

• Stitch density matters more than stitch neatness. Count the stitches — quality garments run 8–12 stitches per inch on major seams; anything looser and the seam will gradually work itself apart.

• Seams should lie flat, not pucker. Puckering means the machine tension was wrong or the fabric was stretched while sewing — both are shortcuts.

• Check the seam allowance — the extra fabric folded inside the seam. Under 1cm and there's nothing for a tailor to work with if you need it let out later. 1.5–2cm means the garment can actually be altered, which matters more the longer you plan to keep it.

• Tug a button, run the zip. A button that gives on a firm tug will be gone within a year. A zip that snags now will fail within twenty wears.

3. The details that separate £30 from £300 - and tell you whether the price is justified

• Pattern matching at the seams (stripes, checks) takes extra fabric and cutting time. It's one of the first things cut from budget production — check the side seams and sleeve join specifically.

• Hem depth: 2–4cm on trousers, skirts and coats is the standard for a garment built to be altered. Under 1.5cm and there's no length to let down as sizing needs change.

• Hardware weight: pick up the zip pull or button between two fingers. Real metal has a small but noticeable weight. Light, hollow-feeling hardware is usually plastic dressed up as metal, and it's the first thing to snap.

4. The five-year test

Before you pay, ask: could this be repaired? Could The Seam actually let this out, take it in, or replace this zip in five years — or is there nothing to work with? Garments built with proper seam allowance, decent hardware, and solid stitching are the ones our tailors can keep alive. The ones built without them usually get replaced, not repaired, which is the more expensive habit over time even when each item is cheap.

Two myths worth dropping

"Expensive means well-made." Not always — we've altered £300 pieces with 0.8cm seam allowances and £30 pieces with proper 2cm ones. Price reflects brand and materials cost, not necessarily construction.

"Made in Italy/Portugal means better quality." Origin can correlate with skilled labour, but we've seen the full range of construction quality from every country. Check the garment, not the label.

The 30-second check, before you buy

• Fabric springs back after scrunching

• No see-through thinness or plastic sheen

• Stitching: straight, dense, no loose threads

• Seams lie flat

• Seam allowance ≥1.5cm (feel inside the seam)

• Buttons and zips feel solid, not light

• Patterns match at the seams

• Hem is 2cm or deeper

• You could imagine having it repaired, not just replaced

As the UK's leading clothing repair and alteration service - The Seam team know what holds up because we're the ones putting it back together when it doesn't. Buy fewer things, built better, and let us keep them in your wardrobe longer.