Sizing is the most common source of disappointment in the AllChinaBuy ecosystem. A well-constructed item that fits poorly is still a failure. This guide teaches you how to take accurate body and garment measurements, read and interpret size charts from different sellers, convert between sizing systems, and avoid the errors that cause most fit problems. With these skills, you will approach every order with confidence rather than guesswork.
Why Size Charts Vary So Much
Unlike major retail brands that standardize sizing across seasons, AllChinaBuy sellers often use different blanks, different grading systems, and different measurement points. One seller's "Large" might match another's "Medium" or even "Extra Large." Batch variations within the same seller can also cause 1-2cm differences. The spreadsheet sometimes flags known sizing quirks, but the most reliable method is comparing the flat-lay measurements to a garment you already own and love.
How to Measure Yourself Accurately
Before you can compare size charts, you need your own accurate measurements. Use a flexible measuring tape, not a rigid ruler or metal tape measure. Measure over thin clothing or directly on skin for the most accurate results. Stand naturally — do not suck in your stomach or puff out your chest. Record each measurement twice to catch errors. Keep a note of your measurements in your phone for quick reference when browsing.
Essential Body Measurements
Chest / Bust
Measure around the fullest part, keeping the tape level and snug but not tight
Waist
Measure at your natural waistline, typically the narrowest point above the belly button
Hips
Measure around the fullest part of your hips and buttocks
Inseam
From crotch seam to ankle bone along the inner leg
Shoulder width
From shoulder tip to shoulder tip across the upper back
Sleeve length
From shoulder tip to wrist with arm slightly bent
The "Compare to Existing Garment" Method
This is the single most reliable sizing technique for AllChinaBuy orders. Take a garment you already own that fits perfectly — a hoodie, t-shirt, or pair of pants. Lay it flat on a hard surface and measure the key dimensions: chest width (armpit to armpit times two), shoulder width, sleeve length, total length, and waist width for bottoms. Compare these numbers directly to the size chart in the spreadsheet or listing. If the chart does not list the dimension you need, ask your agent to request it from the seller before ordering.
Pro Measurement Tips
- Always measure flat-lay garments, not while wearing them
- For width measurements, measure across and multiply by two rather than trying to measure around
- Add 1-2cm for comfortable fit if you prefer a relaxed feel
- For layering pieces, add 2-4cm to chest measurement to account for underlayers
Common Sizing Mistakes to Avoid
Even experienced buyers make sizing errors. The most common mistake is ordering by habit — always assuming you are a "Large" without checking the chart. Another frequent error is ignoring shrinkage, particularly for cotton-heavy items. Some buyers measure incorrectly by pulling the tape too tight or measuring over thick clothing. Others fail to account for the difference between Asian and Western grading, where a US Medium often corresponds to an Asian Large or Extra Large.
Common Mistakes vs Correct Approach
| Feature | Option A | Option B |
|---|---|---|
| Ordering by habit | Assuming you are always a Medium | Checking every chart, every order, every seller |
| Ignoring shrinkage | Expecting post-wash fit to match new | Buying slightly larger for cotton items; checking pre-shrunk notes |
| Tight measurement | Pulling tape snug against body | Keeping tape level with one finger of slack for comfort |
| Asian vs Western sizing | Ordering your usual US size | Converting using chart; often size up one for Asian grading |
| Not measuring garment | Guessing based on brand memory | Flat-lay measuring a well-fitting piece from your closet |
Shoe Sizing Specifics
Shoe sizing introduces additional complexity because length is not the only variable — width, toe box shape, and silhouette type all affect fit. Some shoe models run narrow, requiring wide-foot buyers to size up. Basketball retros often have different internal volume than running silhouettes. The AllChinaBuy spreadsheet sometimes notes "size up half" or "TTS" (true to size) for specific models. Always check these notes and measure your insole length from a shoe that fits well rather than relying on brand conversion charts alone.
Shoe Sizing Checklist
When to Ask Your Agent for Help
If a size chart is missing critical measurements, ask your agent to request them from the seller before you place the order. Most agents are willing to communicate sizing questions, though response speed varies. Provide your body measurements and the fit you prefer — "I want a relaxed fit, here are my chest and length measurements, which size should I choose?" This is more effective than asking "what size am I?" without providing data.
Frequently Asked Questions
Should I always size up for Asian sellers?
Often yes for apparel, but not universally. Check the specific size chart every time. Some sellers use Western grading, and some spreadsheet entries note when sizing is true to Western standards.
How much do clothes shrink after washing?
Cotton-heavy items can shrink 2-5% after the first hot wash. Pre-shrunk or sanforized fabrics shrink less. Tech blends and synthetics usually resist shrinkage.
What if my measurements fall between two sizes?
For fitted items, size up if you prefer comfort. For oversized or boxy cuts, sizing down may work. When uncertain, post your measurements and the chart to r/allchinabuy for community advice.
Do shoe insoles match the listed size exactly?
Not always. Factory variations and last shapes affect internal volume. The spreadsheet often notes batch-specific sizing quirks for popular silhouettes.
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