SuperBuy Size Guide: Converting Chinese to US Sizing in 2026

If you read through Reddit SuperBuy complaint threads, the single most common reason for dissatisfaction is wrong sizing. In 2026, this remains true because Chinese sizing standards differ significantly from US and European standards, and many first-time buyers do not know how to convert between them. The problem is compounded by the fact that different sellers use different size charts, even for the same type of item. A medium t-shirt from one seller might have a 52cm chest, while a medium from another seller has a 56cm chest. Without careful measurement comparison, you are essentially guessing. The good news is that sizing mistakes are completely preventable. All you need is a measuring tape, a garment you already own that fits well, and the patience to compare numbers. This guide teaches you the exact conversion methods for every major category, the common traps to avoid, and how to use SuperBuy QC photos to verify sizing before shipping.

The most reliable way to choose the right size is to measure a garment you already own that fits perfectly. Lay it flat on a table and measure the chest across the front from armpit to armpit, then double that number to get the full chest circumference. Measure the length from the highest shoulder point to the bottom hem. Measure the sleeve length from the shoulder seam to the cuff. Write these three numbers down and compare them directly to the seller size chart. If the seller chart does not list these measurements, ask them before ordering. Do not rely on general size labels like "medium" or "large" because they are meaningless across different sellers and countries. For shoes, the process is similar but uses insole length. Remove the insole from a shoe that fits you well and measure it in centimeters. Compare this number to the seller chart. If the seller does not list insole length, ask for it. Shoe size conversions between Chinese, EU, and US systems are notoriously inconsistent, especially for half sizes. The insole measurement in centimeters is the only universal standard that eliminates confusion.

Each clothing category has its own sizing quirks that trip up buyers. Hoodies and sweaters in the 2026 catalog often run oversized by design, which means a medium might fit like a US large. If you want a fitted look, size down. For the oversized streetwear trend, your normal size is usually correct. T-shirts are the most inconsistent category. Some sellers produce slim Asian-fit tees with a 50cm chest, while others produce boxy Western-fit tees with a 58cm chest for the same size label. Always check the measurements. Jackets and outerwear need extra room for layering. If you plan to wear a hoodie underneath a jacket, add 2-3cm to your chest measurement when selecting the jacket size. Pants and shorts have the additional complexity of inseam length, which is often not listed. Ask for the inseam measurement if you are tall or short relative to average height. Headwear is usually one-size or adjustable, but some caps run small. Check the circumference range if you have a larger head. Sets and tracksuits require checking both the top and bottom measurements separately because they may not scale proportionally.