GTBuy sizing guide: compare measurements before ordering
Use a reference garment, read the measuring method and check the chosen option.
Start with something you own that fits the way you want. Write down its measurements, then compare the same measurements on the selected listing. This gives you a reference more specific than a familiar size letter.
Measure a reference garment
Lay it flat, smooth the fabric without stretching it and follow a consistent measuring method. For a hoodie or T-shirt, start with chest width, garment length and sleeve length. Read the hoodie measuring walkthrough for the starting points.
Check the chart’s method
| Chart detail | Question to resolve |
|---|---|
| Units | Are the figures in centimetres or inches? |
| Chest | Is the number flat width or full circumference? |
| Length | Does it begin at the shoulder near the neck or at the centre back? |
| Sleeve | Where does the measurement start on a dropped-shoulder or raglan design? |
| Option | Does this chart belong to the chosen item and version? |
Compare the numbers before the label
If your reference garment is 60 cm across the chest and the listing gives 55 cm, the listed flat width is 5 cm smaller. That example illustrates the difference only; it is not a recommended size, fit allowance or universal tolerance.
For sneakers, identify the size system
Check whether the option uses EU, UK, US or a length-based label, then read the particular listing’s size chart. Ask about the insole measurement if that is how you compare shoes. A size conversion from another model may not describe this pair. Use the sneaker comparison checklist before deciding.
When a measurement is missing
Ask the seller or service for the chart or a clearly positioned ruler photograph. Confirm the exact option and any charge for extra photographs. Read the QC measurement checks before treating the result as comparable.
Keep size notes with your shortlist
Export the hoodie selection or sneaker selection, then add the selected size, measurements, measuring method and unanswered questions to your own sheet. The product feed does not supply a complete size chart, so those notes are yours to confirm.
Your checklist
- Measure a garment or pair that fits you well.
- Confirm units, starting points and whether the chart uses flat width or circumference.
- Record the exact size and colour you intend to select.
- Ask for a missing chart or measurement before deciding.
Questions about this topic
Should I choose my usual size?
Compare the selected size chart with an item you already own. Check the units and measuring method. Flat chest width, full circumference and sleeve length measured from different points cannot be compared as the same measurement.
Use the sizing guideWhat does the QC reference count mean?
It is the number of QC photo references reported by the source feed. It is not a score, a passed inspection or proof that a photo matches the option you want. A source gallery link is shown only when its public URL is supplied; a count alone does not create an accessible gallery.
What to inspect in QC photosAre the product listing images QC photos?
Not necessarily. A listing image illustrates the catalog entry; a warehouse QC photo should identify the actual ordered item and selected option. We do not relabel listing images as warehouse inspections.
Listing photos versus QC photos