How to Choose the Right Size Using SuperBuy Spreadsheet — Complete Measurement Guide
Master sizing across all 11 categories with this measurement-focused guide. Covers how to measure yourself correctly, how to read Asian size charts, when to size up or down, and category-specific sizing quirks that save you from costly returns.
Why Asian Sizing Is Different — And Why Tag Sizes Lie
One of the most important lessons in the SuperBuy Spreadsheet is this: tag sizes are meaningless across brands. An Asian market "XL" might measure like a US "M" — or in some oversized streetwear styles, like a US "XXL." The variation between brands is so extreme that relying on your usual size is essentially gambling. The SuperBuy Spreadsheet approach replaces tag-size guessing with a measurement-based system: you know your body measurements and your preferred clothing measurements in centimeters, and you compare those directly against each product's size chart. This removes the brand-to-brand inconsistency because you are making decisions based on actual physical dimensions rather than arbitrary letters. Once you make the mental switch from "I am a size L" to "I need a chest width of 58-62cm and a body length of 70-74cm," sizing mistakes drop to near zero.
How to Measure Yourself Correctly for SuperBuy Purchases
Accurate self-measurement is the foundation of the entire spreadsheet sizing system. You will need a soft measuring tape (available for a few dollars at any craft or sewing store) and a mirror — or better yet, a friend to help. For tops (t-shirts, hoodies, jackets, jerseys): measure your chest circumference at the widest point, usually just under the armpits. Measure shoulder width from the outer edge of one shoulder to the other across your back. Measure sleeve length from shoulder point to wrist. For bottoms (pants, shorts): measure your waist at the narrowest point, usually around the navel. Measure hip circumference at the widest point around your seat. Measure inseam from crotch to ankle bone. For shoes: measure your foot length by standing on a piece of paper, marking the heel and the tip of your longest toe, then measuring the distance in centimeters. Write these numbers down and keep them accessible — you will reference them for every purchase.
Pre-Flight Checklist
- Chest: widest point under armpits (cm)
- Shoulders: outer edge to outer edge across back (cm)
- Waist: narrowest point around navel (cm)
- Hips: widest point around seat (cm)
- Inseam: crotch to ankle bone (cm)
- Foot length: heel to longest toe standing (cm)
Reading Product Size Charts: The Flat-Lay Difference
Most SuperBuy product listings provide measurements taken from the garment laid flat, not body measurements. This distinction is critical. A "chest width" of 58cm on a flat-lay measurement means the garment's full chest circumference is approximately 116cm (58 × 2). The rule of thumb for a comfortable regular fit: your body measurement plus 4-8cm of ease. So if your chest measures 100cm, you want a garment with a flat-lay chest width of 52-54cm (104-108cm circumference), giving you 4-8cm of breathing room. For an oversized look, add 10-15cm of ease. For a slim fit, add 2-4cm. Different categories use different ease formulas: hoodies and sweaters get more ease because they are worn over other layers, t-shirts get moderate ease, and jerseys in player version get very minimal ease because they are designed to be form-fitting.
| Category | Fit Type | Ease to Add | Example (100cm chest) |
|---|---|---|---|
| T-Shirts | Regular | +4-8cm | Flat-lay chest: 52-54cm |
| Hoodies | Regular | +8-12cm | Flat-lay chest: 54-56cm |
| Jackets | Regular | +8-14cm | Flat-lay chest: 54-57cm |
| Jersey (Player) | Slim | +2-4cm | Flat-lay chest: 51-52cm |
| Jersey (Fan) | Regular | +6-8cm | Flat-lay chest: 53-54cm |
Category-Specific Sizing Quirks to Know
Each category in the SuperBuy Spreadsheet has sizing quirks that experienced buyers learn over time. Shoes: Asian sizing runs 1-1.5 sizes smaller than US — a US 10 typically needs an Asian 44-45, but always use your foot length in cm as the primary reference. Hoodies: sleeve length is often the limiting factor for taller buyers — a hoodie that fits perfectly in the chest may have sleeves that are too short, so always check sleeve measurement separately. Pants: the rise measurement (front rise from crotch to waistband) dramatically affects where pants sit — low-rise pants require a larger waist measurement than high-rise pants of the same tagged size. Jersey player versions: these are cut for athletic builds and can be extremely slim — many buyers size up one or even two sizes compared to their fan version size. Sets: the top and bottom in a set may use different sizing scales — always check individual measurements for both pieces rather than assuming they are proportional.
What to Do When Your Measurements Fall Between Sizes
Being between sizes is the most common sizing dilemma. The SuperBuy Spreadsheet decision framework: if you are between sizes on a top (t-shirt, hoodie, jacket), prioritize the chest measurement. A slightly loose body is more comfortable than one that is too tight — and fabric shrinks slightly after washing. For bottoms, prioritize the waist measurement but also check thigh width if you have athletic legs. For shoes, always size up to the next half or full size if you are between — insoles and thicker socks can fill extra space, but shoes that are too small cannot be stretched meaningfully. When in doubt, check community feedback for the specific product. If multiple Reddit reviewers mention that a particular item "runs small, size up," that is more reliable than the size chart alone. The spreadsheet approach encourages using community data as a tiebreaker when measurements are ambiguous.
Frequently Asked Questions
Ready to Apply This Guide?
Use what you have learned to browse the complete catalog with confidence. Start with the most relevant category for this guide.