The sportswear size is a fit story before it is a number: the compression fit, the yoga fit, and the basic fit each carry a different chart, and the wholesale buyer who states the fit intent gets the size curve that protects the margin. Knitwear Base (Finetex), a China-based knit apparel manufacturer with over 20 years of experience, produces knit programs across the compression, the yoga, and the basic categories, which makes it a practical reference for how a wholesale buyer should plan the sizing. This guide builds the sportswear sizing from the fit story to the size curve.
Athletic Fit Is a Size Story
The athletic fit is a size story because the fit and the size are one decision. The compression fit runs close, the yoga fit runs with the body, and the basic fit runs regular, so the buyer should state the fit intent per line before the chart. The customer who buys on the fit story buys the right size.
| Fit line | The behavior | The buyer’s note |
|---|---|---|
| Compression | Close, supportive | Runs small |
| Yoga | With the body, stretchy | True to the movement |
| Basic | Regular, comfortable | True to size |
The fit story should be written into the catalog. The note that says the compression runs close, or the yoga runs with the body, sets the customer’s expectation, and the expectation is the return’s control.
Compression, Yoga, and Basic Fits Compared
The three fits should be measured and charted separately. The compression fit’s close measurements, the yoga fit’s movement allowance, and the basic fit’s regular ease sit on three charts, so the buyer should confirm the three with the factory and verify them on the size sets. The chart that mixes the three inherits the fit complaints.
The three fits should also be read against the activity. The compression customer buys for the support, the yoga customer for the movement, and the basic customer for the comfort, so the fit intent should match the customer’s day.
The three fits should also be read against the fabric. The stretch and the recovery of the fabric change the fit, so the buyer should verify the fits in the actual fabrics and update the charts with the data.
The three fits should also be read against the return data. The fit returns grouped by the line show where the chart and the construction are off, and the correction belongs in the order spec, because the return loop is the fit’s editor.
Building the Wholesale Size Curve
The wholesale size curve should be built from the channel’s demand. The buyer should collect the sales data by size and build the curve per fit line, with the middle sizes carrying the depth and the ends kept small. The factory cuts to the order, so the curve the buyer confirms is the stock the warehouse receives.
The curve should be tested with the first order. The buyer should carry a test ratio per line, measure the sell-through by size, and rebalance before the reorder, because the channel’s curve is learned from the sales rather than predicted.
The curve should also be read against the returns. The wrong-size returns grouped by the line show where the curve is off, and the correction belongs in the order spec, because the return loop is the curve’s editor.
The curve should also be read against the channel. The basics and the performance channels can carry different curves, so the buyer should build the curve from the channel’s own sales data and review it per window.
Fit Testing Before Bulk
The fit testing before the bulk should run across the body types. The buyer should wear-test the size sets per line and record the fit comments, because the sportswear fit is judged in the movement, not on the table. The wearing test is the fit’s evidence.
The fit testing should also include the activity. The compression fit should be tested in the support, the yoga fit in the poses, and the basic fit in the everyday wear, so the buyer should test each line in its activity. The activity test is the fit’s real check.
The fit testing should also be read against the size chart. The measurements should be verified and the fit notes should be updated with the wearing data, because the chart that matches the product is the one the customer trusts.
The fit testing should also be read against the sampling. The size sets should be part of the sample round, and the fit records should be filed with the order, because the wearing evidence is what the bulk and the reorder check against.
Adjusting From Sell-Through Data
The size curve should be adjusted from the sell-through data. The buyer should review the sales by size after the test window, group the returns by the size and the reason, and rebalance the curves before the reorder. The data is the curve’s correction.
The adjustment should also be read against the reorder economics. The size that sells out first earns the deeper cut, and the size that returns earns the shallower one, so the buyer should rebalance the curves with the margin in view.
The adjustment should also be shared with the factory. The buyer who sends the sell-through and the return clusters gets the reorder cut to the corrected curves, and the shared data turns the sizing from a buyer-side guess into a supply-side standard.
The adjustment should also be timed with the reorder. The sizing data needs the selling weeks and the return window to settle, so the buyer should review after the full picture arrives and place the reorder against the corrected curve.
Sportswear Sizing Template
The template turns the sizing into a repeatable plan. For each fit line, write the fit intent, the size curve, the activity test, and the reorder trigger, and confirm the combination before the order. The template makes the sizing visible and the reorder decision data-driven.
A distributor’s buying view on sportswear sizing
A distributor’s buying team would treat the fit story as the sizing’s first return control, because the customer who buys on the fit note should find the fit the chart promised. The buyer who measures the three lines separately, tests the fits in the activities, and adjusts the curves from the data gets a sportswear line that the customer keeps, and the kept line is the one the margin protects.
Distributors can request the sportswear sizing guidance through Knitwear Base’s contact page, and the compression clothing page and the yoga clothing factory page document the programs the sizing plan starts from.
The sizing request should also carry the fit lines. The buyer who names the compression, the yoga, and the basic lines and the channels gets the charts and the curves developed against the actual demand, and the factory can grade the three from the same evidence. The named lines are the sizing brief’s precision.
The sportswear sizing is a return-control system before it is a chart. The buyer who reviews the fit returns by style and size line, corrects the charts against the new production, and re-verifies the size sets before each reorder keeps the sizing aligned with the bodies the channel serves. The fit line that earns its depth from the sell-through is the line the next order deepens. The sizing program that is adjusted on evidence is the program that minimizes the exchange line.
Why is the athletic fit a size story?
The fit and the size are one decision, with the compression running close, the yoga running with the body, and the basic running regular, so the fit intent is stated before the chart.
How do the three fits compare?
The compression fit’s close measurements, the yoga fit’s movement allowance, and the basic fit’s regular ease sit on three separate charts, verified on the size sets.
How do I build the wholesale size curve?
From the channel’s sales data per fit line, with the middle sizes carrying the depth, tested with the first order and rebalanced with the sell-through by size.
How is the fit tested before the bulk?
Across the body types and in each line’s activity, with the fit comments recorded and the size chart updated with the wearing data.
How do I adjust the curve?
From the sell-through by size and the return clusters, rebalancing the curves before the reorder and sharing the data with the factory.
Sources
The sportswear sizing also runs through the movement fit. The buyer should fit-test the size set in the sport’s actual positions, because the squat, the reach, and the stride all change the garment’s behavior on the body, and the chart that measures the static garment misses the dynamic fit. The comments from the fit test should be filed with the chart so the reorder is graded against the same movement standard. The sizing that is tested in the movement is the sizing the athlete keeps.
The movement fit should also be read against the size set. The buyer who fit-tests every size in the range, not only the sample size, catches the grading problems that appear at the extremes, and the comments per size should be filed with the chart. The athlete who wears the smallest and the largest sizes is the athlete who reveals the grading error. The sizing that is verified across the range is the sizing the whole team keeps. The same movement fit should also be confirmed on the reorder, because the fabric lot can change the stretch and the recovery between the productions, and the chart that was verified on the first lot may need a correction on the second.
