How to Create a Clothing Size Chart: Measurements, Grading and Fit Tips

Key Takeaways

• Start with one base size, usually medium, and grade up and down from it.
• Garment measurements and body measurements are different; label which you publish.
• Set tolerances so factories know how much variation is acceptable.
• Always verify the chart on a physical sample before you place a bulk order.

Step 1: Choose Your Base Size and Fit

Pick the size you will develop first. Most brands use medium for tops. Decide the fit too: slim, regular, relaxed or oversized, because the same chest measurement means a very different garment in each fit.

Step 2: List the Points of Measure

For a hoodie or t-shirt, common points of measure include:

• Chest width, measured across the garment flat
• Body length from the high point shoulder
• Shoulder width and sleeve length
• Sleeve opening and cuff width
• Hem width
• Neck opening

Write these into your tech pack so the factory builds exactly what you expect.

Step 3: Apply Grading Rules

Grading means increasing or decreasing measurements by a set amount from size to size. A common starting point for tops is to change chest width by about 1 to 2 inches (2.5 to 5 cm) per size and body length by about 0.5 to 1 inch. These numbers vary with fit and market, so treat them as a starting point and adjust after your fit tests. See grading cost in apparel manufacturing for how factories handle it.

Step 4: Set Tolerances

A tolerance is how far a finished garment can differ from the spec and still pass. Many brands allow roughly half an inch to one inch on major measurements, depending on the garment. Stating tolerances in writing prevents disputes at quality control.

Step 5: Test on a Fit Sample

Order a sample in the base size, try it on a fit model, and record what to change. Then check a larger and a smaller size, because grading problems often show at the ends of the range. Update the chart only after you approve the samples.

Publishing Your Size Chart on Product Pages

• State whether the numbers are garment or body measurements.
• Use both inches and centimeters for international customers.
• Add a short how-to-measure guide to reduce returns.
• Keep one chart per fit type, such as regular and oversized.

Frequently Asked Questions

What is a size chart in clothing manufacturing?

A size chart lists the measurements for each size of a garment so the factory can produce consistent sizes. It is part of the tech pack.

What is grading in apparel?

Grading is the process of scaling a base-size pattern up and down to create the other sizes using set measurement increments.

How much should each size increase?

For tops, chest width often changes by about 1 to 2 inches per size, but the right increment depends on your fit and target market.

Should I publish garment or body measurements?

Either works if you label it clearly. Many brands show garment measurements and add a guide so customers can compare with a garment they own.