Underwear Buying Guide
Underwear Size Guide: A Buyer Guide
Sizing is where underwear buying most often goes wrong, because a size label means different things in different ranges. This guide explains how to think about sizing as a buyer, how to measure, and what to confirm with a supplier, without publishing any size chart as a specification. Size charts belong to a confirmed order, agreed against samples, not to a general guide.
At a Glance
- Labels are shorthand: work from measurements and fit notes, not labels alone.
- Measure waist, hip, rise and length, and record them beside each style.
- Fit notes describe close or relaxed, high or low, and movement.
- Confirm measuring method and fit description before ordering.
- Check fit consistency across the whole range, not one garment.
Why size labels differ between ranges
A size label is a shorthand, not a measurement, and different ranges use that shorthand differently. Cut, fabric stretch, and intended fit all change what a label feels like in wear, so two garments with the same label can fit differently. Buyers who treat a label as a promise will disappoint customers.
The remedy is to work from measurements and fit notes, not labels alone. Ask how a range is measured, ask what fit it is intended to give, and test the answers against samples in the planned styles. A label you have tested is worth more than a label you have only read.
How to measure for underwear buying
Measuring for underwear starts with the body points that decide fit: waist, hip, and the rise and length that suit the style. Measure over light clothing or directly on the body, keep the tape level and snug without pulling tight, and record the measurements beside the style they belong to. Measurements without a style attached are easy to misapply.
Record measurements for each wearer group you serve, because one group's measurements do not transfer to another. Keep the record with your brief, so the supplier and your own team work from the same numbers when the order is discussed.
Fit notes: the words behind the numbers
Numbers alone do not describe fit. A garment can match its measurements and still feel wrong if the cut, stretch, or rise does not suit the wearer. Fit notes fill that gap: they say whether a style should sit close or relaxed, high or low, and how it should move with the body.
Write fit notes for every style in your range, in plain words your team and your supplier can both use. Test the notes against samples, adjust the words where the sample disagrees, and keep the agreed notes with the approved sample for later orders.
What to confirm with a supplier
Before ordering, confirm how the supplier measures each style, how fit is described for that style, and how samples will be checked against those points. Ask for a sample in the planned styles, check it against your measurements and fit notes, and record any change before approving the range.
Also confirm how sizing questions from your customers will be answered. Clear sizing guidance on your own shop floor reduces returns more than any chart, because customers who understand the fit buy the right size first.
Sizing for a range, not a single garment
A range needs sizing that works across styles, not sizing that works for one garment alone. Check that the fit story stays consistent from style to style, so a customer who buys one style can trust the next. Inconsistency across a range is what drives returns and complaints.
When you write your enquiry, name the wearer groups, describe the fit for each style, and ask the Sales Team to confirm the sizing approach for your order. Ask for samples across the range, and check consistency before you commit stock.
Turn This Guide Into an Enquiry
Use the guide to write a brief, not to place an order on its own. Name the range, name the styles, describe the hand feel and finish, and name the wearer group for each style. Then share your quantity and target date, and ask the Sales Team to confirm the terms for your order. Ask for samples in the planned styles, and check them against the brief before approving anything.
- Share your quantity and target date to get the terms for your order.
- Describe the fit you want and ask for samples in the planned styles.
- Ask how finished garments will be checked against the approved sample.
- Ask about certificate detail for your order: Certificates available upon request.
Questions About This Guide
Should I publish a size chart from this guide?
No. This guide explains how to think about sizing. A size chart for your range should be agreed against samples for your confirmed order, and checked before you publish it to customers.
What if customers complain about fit?
Check the complaint against your measurements, fit notes, and approved sample. If the sample and the complaint disagree, the fit note or the sample needs correcting before the next order.
Send Your Underwear Enquiry to the Sales Team
Describe the range this guide helped you shape, share your quantity and target date, and ask the Sales Team to confirm supply for your order.