Why Sizing Fails
Sizing is the number-one source of disappointment for JoyaGoo spreadsheet buyers, and the root cause is almost always the same: buyers order by habit rather than measurement. A buyer who has worn US Medium for ten years assumes they are a Medium in every factory's chart. They are not. Asian sizing systems often use centimeters as the base unit, have different proportions between chest and length, and assume a different average body type than US brands.
In 2026, the spreadsheet has improved by including more detailed size charts, but the responsibility still lies with you to measure correctly and interpret the numbers. This guide teaches you how to measure yourself, which measurements matter for each category, and how to convert between sizing systems without guessing. If you follow this process, you will eliminate most sizing-related returns and disappointment.
How to Measure Yourself
Chest / Bust
Measure around the fullest part of your chest, keeping the tape horizontal and snug but not tight. Record in centimeters.
Shoulder Width
Measure from the edge of one shoulder bone to the other across your upper back. This determines fit in structured and boxy garments.
Length
For tops, measure from the high shoulder point to your desired hem. For pants, measure from the waistband to the desired break.
Sleeve / Inseam
For sleeves, measure from shoulder seam to wrist bone. For pants, measure from crotch seam to ankle or desired hem.
Waist and Hip
For bottoms, measure waist at the navel and hips at the widest point. For underwear, hip measurement is more predictive than waist.
Size Conversion Reference
| Asian Size | Chest (cm) | Shoulder (cm) | Equivalent US |
|---|---|---|---|
| S | 90-94 | 42-44 | XS-S |
| M | 96-100 | 44-46 | S-M |
| L | 102-106 | 46-48 | M-L |
| XL | 108-112 | 48-50 | L-XL |
| XXL | 114-118 | 50-52 | XL-XXL |
Category-Specific Sizing Notes
Shoes
Measure foot length in millimeters. Last shapes vary between factories, so US 9 does not mean the same length everywhere.
Hoodies
Asian hoodies run shorter in torso length. Size up once for a standard fit, twice for oversized.
Pants
Measure a well-fitting pair flat and doubled. Hip measurement is more predictive than waist for Asian pants charts.
T-Shirts
Boxy and oversized fits are intentional but may still run short in length. Check the shoulder drop and length separately.