The number one reason for returns and disappointment in the SuperBuy t-shirt category is sizing. A medium in the United States is often an extra-large or even double-extra-large in Asian sizing. The gap is not consistent across sellers, and size charts posted by sellers are not always accurate. In 2026, experienced SuperBuy buyers have learned to ignore size labels entirely and instead work from garment measurements. This guide explains the Asian-to-US size conversion reality, how to read SuperBuy spreadsheet sizing notes, and the measurement techniques that eliminate fit guesswork.
Asian sizing runs significantly smaller than US and European standards. The difference is not just one size — it is a full size shift plus a narrower cut. An Asian large t-shirt typically has the same chest measurement as a US medium, but with shorter sleeves, a shorter torso length, and a tighter shoulder width. This means a direct label swap often results in a shirt that is technically the right chest size but feels wrong everywhere else. The solution is to stop thinking in sizes and start thinking in centimeters.
| Asian Size | Chest (cm) | Length (cm) | US Equivalent | Recommendation |
|---|---|---|---|---|
| M | 96-100 | 66-68 | XS-S | Size up 1-2 sizes |
| L | 100-104 | 68-70 | S-M | Size up 1 size |
| XL | 104-108 | 70-72 | M-L | Closest to US M |
| 2XL | 108-112 | 72-74 | L | Closest to US L |
| 3XL | 112-116 | 74-76 | L-XL | Check length first |
Asian L T-Shirt: Chest 100-104cm, Length 68-70cm, Shoulder 42-44cm. Fits like a US small-medium. Best for slim builds or cropped looks.
Asian XL T-Shirt: Chest 104-108cm, Length 70-72cm, Shoulder 44-46cm. Fits like a US medium. Most versatile option for average builds in the United States.
Measure Your Best Shirt
Lay your favorite-fitting t-shirt flat. Measure chest (armpit to armpit), length (shoulder to hem), and shoulder width for reference.
Compare to Size Chart
Find the seller's size chart and match your measurements, not your usual size label. Add 2cm if you prefer a looser, more relaxed fit.
Read Spreadsheet Notes
Community spreadsheets often contain sizing warnings like 'size up twice' or 'fits oversized.' Always read the notes column before ordering.
Check Fabric Stretch
100% cotton has minimal stretch. Cotton-poly blends or jersey knits may fit slightly larger. Factor this into your size choice.
Order Test Size First
For new sellers, order one t-shirt in your calculated size before placing a bulk order. A fit test saves money on returns and exchanges.
The most reliable sizing strategy in 2026 is to create a personal measurement card. Measure your best-fitting t-shirt across the chest, shoulder, length, and sleeve. Write these numbers down and compare them directly to every seller's size chart before ordering. Do not rely on size labels. Do not trust 'true to size' claims. Only centimeters tell the truth. When a seller does not provide a size chart, ask for one before ordering or choose a different seller.
Spreadsheet Notes Are Gold
Spreadsheet sizing notes are community gold. A note that says 'size up two, runs small' from a buyer who actually received the item is more valuable than any seller's generic size chart. Prioritize community notes over seller descriptions.
Oversized Does Not Mean US Oversized
Never assume 'oversized' in an Asian listing means the same thing as oversized in US fashion. An Asian oversized fit might only add 2-3cm to the chest measurement, which is barely noticeable. Always check the actual numbers, not the style description.
T-shirt sizing is the most solvable problem in the SuperBuy ecosystem. The buyers who never have fit issues are the ones who abandoned size labels years ago and now operate exclusively from measurement comparisons. It takes five minutes to measure your favorite shirt and two minutes to compare it to a size chart. Those seven minutes save you from the hassle of returns, the cost of reshipping, and the disappointment of a shirt that never leaves your drawer. In 2026, measure first, order second.
