An ecommerce size guide brief defines how customers will compare their measurements with the items a shop actually sells. For a Kenyan clothing store, labels such as small, medium and large are only part of the information. A buyer also needs to understand what is measured, which product the chart describes and whether the figures refer to the body or the garment.
Prepare this information with your ecommerce website development team before importing a large catalogue. A size selector and a size guide serve different purposes: one chooses a sellable variant, while the other helps the customer judge its suitability.
The examples here are illustrative planning exercises. They do not prescribe clothing measurements, guarantee fit or state a universal sizing standard. Obtain the actual measurements from the responsible product owner or a checked sample.
Identify which products share a valid guide
Group products by the measurement information they genuinely share. Two garments may use the same size labels while differing in cut, fabric or supplier. Do not attach a convenient chart to the whole store without checking whether it describes each range.
Create a guide register with a reference, product family, supplier or sample source, measurement method, approval owner and version. Connect each product or variant to the correct guide reference. This makes it possible to replace one chart without searching through every product description manually.
Include adult and children's ranges separately when the information differs. Avoid assuming that a child size label maps to a specific age unless the product source supports that statement. If an age description is used, explain its role alongside the actual measurement information rather than presenting it as an exact fit promise.
Decide whether numbers describe the body or garment
Write a plain sentence explaining the basis of the chart. A body measurement and a flat garment measurement are different pieces of information. Customers should not need to infer the method from a photograph or guess whether a displayed width represents a full circumference.
Ask the product owner to demonstrate the measuring process on a sample. Record the start and end points, whether the item lies flat and how it is positioned. A simple approved illustration can make the method clearer, especially where terms such as length could refer to several different distances.
Keep the method consistent within a guide. If one supplier provides body measurements and another provides finished garment dimensions, preserve that distinction. Converting the headings without checking the underlying numbers can create a chart that looks consistent while describing incompatible information.
Collect measurements with a clear source
Use a worksheet with one row per size and a column for every approved measurement. Include the units and the product reference. Keep a separate field for unresolved questions so that an uncertain number does not become a public specification by accident.
For a representative sample, compare the worksheet with the actual item or an approved supplier document. Ask the responsible person to resolve discrepancies. The website team can organise the data, but it should not invent measurements to fill gaps or estimate them from a photograph.
If the business wants to state a manufacturing tolerance, have the product owner approve the wording and basis. Do not add a standard-looking tolerance copied from another shop. A statement about variation is part of the product information and should describe the goods being sold.
Design a readable chart for mobile customers
Ask the designer to show the longest real chart on a narrow phone screen. Check that size labels, units and measurement headings remain connected. A wide screenshot of a spreadsheet can be difficult to read and may separate the explanation from the numbers customers are comparing.
W3C's tables tutorial explains that accessible data tables use marked headers and defined relationships between headings and values. Ask the developer to preserve those relationships in the size chart. The visual styling alone does not explain which measurement belongs to which size.
Choose an approach for wider tables and test it. Horizontal scrolling, a simpler chart or a product-specific guide may be appropriate, depending on the data. Avoid shrinking the text until the chart technically fits but the customer cannot comfortably read it. Keep the measurement instructions available beside the chart.
Connect the guide to the selected product
Place the guide where a shopper chooses a size, with a clear label explaining what will open. Check the behaviour when the product changes, when a different range is selected and when the customer arrives directly on a variant link.
Do not allow a guide to change the selected purchase option without a deliberate action. A customer might consult several rows while comparing measurements. Looking at a large size in the chart should not silently add a large variant to the cart if the store was set to medium.
Keep unavailable sizes understandable. A chart can describe sizes the manufacturer makes even when the shop does not currently stock all of them, but the purchase options should accurately show the current offer. Decide whether a shorter product-specific chart would reduce confusion for that range.
Write fit notes that can be supported
Separate measurements from descriptive fit notes. Terms such as relaxed, fitted or oversized should reflect the actual product and approved description. They should not act as substitutes for missing measurements or promise how an item will look on every customer.
If a model photograph is used for reference, confirm the relevant information before publishing it. The pictured garment size, model measurements and any styling adjustments need factual ownership. Leave uncertain details out rather than inventing a typical model profile.
Explain any important differences between options. A change in fabric or construction may require a different guide. Check whether the colour choices really belong to the same garment specification. A shared product title does not prove that every supplier batch has identical measurements.
Define support and exchange handoffs
Give customer service staff the same guide customers see. Include its reference and version in internal instructions so that support does not quote an older spreadsheet while the website displays updated information. Decide who answers questions about unclear measurements.
Keep sizing advice separate from exchange approval. Staff should use the actual store policy and order information when handling a request. This article does not set a return entitlement or a universal exchange policy. The refund workflow planning guide addresses the operational approval process separately.
Record recurring questions without collecting unnecessary personal information. If customers repeatedly ask where sleeve length starts, improve that explanation. A question log can inform clearer content without turning ordinary support into an unsupported claim that a guide has reduced returns by a particular percentage.
Test mappings before publishing the full range
Prepare a small set of representative products in a safe review environment. Include one simple chart, one different product family and one range with an unavailable size. Have a reviewer find the guide from each product and identify exactly which item it describes.
Compare the public numbers with the approved worksheet. Check unit labels, row order, decimal formatting and all measurement headings. Test closing the guide, returning to the size selector and adding a fictional item in an isolated test flow. Confirm the chosen variant remains the one the reviewer selected.
Include keyboard and mobile review in acceptance. The guide should open and close predictably, with readable content and controls. Ask the developer to demonstrate how a person using assistive technology understands the chart rather than approving it solely from a desktop screenshot.
Plan updates when stock sources change
Name an owner for chart changes and define the trigger for review. A new supplier, altered cut or revised product specification may require a new guide. Keep the previous version available internally so staff can understand which information applied to an earlier order.
Connect this record with your product catalogue spreadsheet. Stable product references make guide mapping easier to audit. Avoid using filenames alone as the relationship between a chart and hundreds of variants.
When requesting store development, send a sample product, its approved measurements and the intended guide location. Request an ecommerce quotation that includes guide management, mobile presentation and acceptance checks. This lets the team discuss a maintainable feature rather than a single image pasted into a description.
Frequently asked questions
Can one chart cover our entire clothing catalogue?
Only if the measurements and method genuinely apply to the products concerned. Review each range before sharing a guide across it.
Should we use centimetres or inches?
Choose the approved units your customers can understand and label them clearly. If offering conversions, have the values and display method checked instead of mixing units without explanation.
Can a size guide guarantee the right fit?
No. It provides product information for comparison. Keep fit wording accurate and avoid promising the same result for every person.
What if a supplier has not provided measurements?
Hold the uncertain information for confirmation or arrange an appropriate sample check. Do not copy another brand's chart simply to complete the page.
