Use Automatic Sizing when you want Dropstitch to calculate a product size from measurements such as width, length, waist, or inseam.

Before you start

Confirm your store measurement unit in Set up Localization Settings in Dropstitch.
Make sure your products have a product category before expecting sizing rules to match.
Capture or fill in the measurements used for sizing. Automatic Sizing currently supports Width, Length, Waist, and Inseam.
Start with Dropstitch defaults unless your store already has its own sizing logic.

How it works

Automatic Sizing uses sizing tables. A sizing table contains size labels and measurement ranges.

For example, a tops table might say:

Size	Width range	Length range
S	51.5-55.5 cm	71-75 cm
M	55.5-58.5 cm	75-77 cm

Each sizing table also has category coverage. If a table targets a broad category, its subcategories can use the same sizing table too.

Automatic Sizing has 3 important parts:

Part	What it controls
Sizing table	The size labels and measurement ranges, such as XS, S, M, L, XL
Categories	Which product categories use that sizing table
Status	Whether that sizing table actively fills product sizes

There is no separate global Automatic Sizing toggle. Turn automatic sizing on or off per sizing table with the Status switch.

When a product has a matching category and measurements, Dropstitch compares those measurements with the active sizing table:

For tops, Dropstitch uses width and length. Width is the stronger sizing signal.
For bottoms, Dropstitch uses waist and inseam where those measurements are available.
For jeans, Dropstitch can combine the matched waist and inseam values using the configured separator.

When Dropstitch fills a size automatically, the Size cell shows an automatic sizing icon. Click it to open the Automatic sizing match dialog and see which sizing table, category match, measurements, and ranges produced the result.

You can still override the Size cell manually before publishing.

How to use it

Go to Settings > Automatic Sizing.
Click Install defaults.
Choose the Dropstitch default sizing tables you want to copy into your store, then click Install sizing.
Review the sizing table list. The main columns are Name, Categories, Created, and Status.
Use the Status switch to turn automatic sizing on or off for a table.
Click a sizing table name or choose Edit sizing from the row menu.
Review the covered categories. If the table covers more than one category, click View categories to inspect the coverage.
Click Add sizing or Add size range when the table has no ranges yet.
Choose Width + Length or Waist + Inseam.
Set the Size label, Min. values, and Max. values.
Click Save.
Open List, fill the product category and measurements, then review the Size cell in the Listing Grid.

Success check

Your active sizing tables appear in Settings > Automatic Sizing.
Each table has the expected category coverage.
Each table has size ranges for the measurements you expect Dropstitch to use.
A product with a matching category and measurements gets a filled Size value in the Listing Grid.
Clicking the automatic sizing icon opens the Automatic sizing match dialog.

Tips

Use Install defaults first, then adjust only the ranges that do not match how your store sells.
Keep one sizing table for each real sizing system. For example, use different tables when vintage denim, shorts, and tops need different logic.
Keep measurement units consistent. Do not mix centimeter ranges with inch measurements.
Use broad category coverage when subcategories share the same sizing rules.
Use more specific custom sizing when a category needs different fit logic.
Review a small batch before relying on Automatic Sizing across a larger listing run.
Archive sizing tables you no longer use instead of leaving old rules active.

Advanced settings

Use the row menu on a sizing table when you need to manage the table itself:

Action	What it does	Use when
Edit sizing	Opens the sizing table details	You need to review or change size ranges
Rename	Changes the table name	Your team needs a clearer label
Duplicate	Copies a sizing table to another category	A new category should start from existing ranges
Reset to Dropstitch default	Replaces the current ranges with the current Dropstitch default	You want to undo custom range changes
Archive sizing	Removes the table from the active list	You do not want the table used right now
Restore	Brings an archived table back	You archived a table by mistake or need it again

Use Create sizing when you need a new store-owned table instead of starting from a Dropstitch default. Choose the categories that should use it, give it a recognizable name, then add the first size ranges.

Default sizing is intended as a starting point for common apparel workflows. If your catalog uses a category or sizing system that does not have a useful default, create a custom sizing table and target it to that category.

Troubleshooting

Automatic Sizing is not visible: the feature may not be enabled for your store yet. Contact support if you expected to see it in settings.
Size does not fill in the Listing Grid: confirm the sizing table is active, the product has a category, the category is covered by the table, and the product has the needed measurements.
The wrong size was filled: click the automatic sizing icon in the Size cell and review the matched table, category, measurements, and ranges. Adjust the ranges or override the size manually.
The product is using broader category rules: create a more specific sizing table for that product category, or edit the inherited source table if the broader rule should change.
I cannot install defaults: all default sizing categories may already be installed or archived. Check Archived or use Create sizing.
I cannot save a size range: make sure the size label is filled, both minimum and maximum values are present, the minimum is lower than the maximum, and the range does not overlap another range for the same measurement.
I need another measurement type: Automatic Sizing currently supports Width, Length, Waist, and Inseam. Contact support if your workflow needs another measurement.

Value reflection

Without Automatic Sizing, every one-of-one item needs a manual size decision after measurements are entered. Automatic Sizing turns that repeated judgment into store-owned rules that can run in the grid, while still leaving room for manual overrides. Once your sizing tables are set, daily listing work becomes faster and more consistent.