MerchentiaHow to measure clothing for accurate size charts
Returns spike the moment a size label can’t be trusted. A shopper reads “M”, isn’t sure what that means for your product, and hedges. An accurate, garment-measured size chart fixes that — it replaces a guess with real numbers anyone can check against their own.
Why accurate measurements matter
A generic S/M/L tells a shopper almost nothing. The same “M” varies between brands, between products, and between a fitted tee and a relaxed knit in your own catalogue. Shoppers have learned not to trust the label, so they either order two sizes to compare or guess and send back the miss.
Real numbers change that. When your size chart lists the actual measurements of the garment, shoppers can match them against a piece they already own and buy with confidence. The result is fewer wrong-size orders and fewer returns.
Measure the garment, not just the body
The most repeatable way to build a chart is to measure the item itself. Lay the garment flat on a hard, flat surface, smooth out any wrinkles, and keep the tape straight along each measurement — no sagging, no stretching the fabric. For widths taken flat, like chest, measure across one side and double it (half-chest ×2) to get the full circumference.
Measuring flat is objective: anyone on the team can repeat it and get the same number, and you can verify a supplier’s spec sheet against the real garment in your hand.
Which measurements to take
Match the measurements to the garment type so the chart answers the questions a shopper actually has:
- Tops & dresses — chest/bust, waist, hip, length, and sleeve.
- Bottoms — waist, hip, inseam, rise, and leg opening.
- Shoes — foot length, which maps to your size run.
Step by step
- Gather your tools. A flexible flat tape measure and a hard, flat surface — a table or the floor, not a bed or a cushion that distorts the shape.
- Measure each garment flat. With the item laid flat, take chest (pit-to-pit ×2), waist, hip, length, and sleeve, keeping the tape straight on every reading.
- Build the chart. Make the rows your sizes and the columns your measurements, and offer both centimetres and inches so no shopper has to convert.
- Add a how-to-measure guide. Show shoppers how to measure themselves the same way you measured the garment, so their numbers line up with your chart instead of fighting it.
Do it with Size & Fit Guide
Merchentia: Size & Fit Guide turns those measurements into a chart shoppers trust. Build unlimited size charts (measurement table, text, or image), add a cm⇄in toggle and a how-to-measure guide in 15 languages, and assign charts by product, collection, type, or tag so the right one shows automatically. A Pro fit finder recommends each shopper’s best size from a couple of measurements. It installs as a theme app extension with no code changes, and stores no shopper personal data.
Frequently asked questions
What measurements should a size chart include?
Chest/bust, waist, hip, length and sleeve for tops; waist, hip, inseam and rise for bottoms. Match the measurements to the garment type.
Should I list garment or body measurements?
Both help, as long as you label them clearly. Garment-flat measurements are the most repeatable to take and verify.
Centimetres or inches?
Offer both with a toggle, since shoppers differ by region. The same chart serves everyone when they can switch units.
How does this reduce returns?
When shoppers can match their own measurements to real numbers, far fewer order the wrong size and send it back.