GTBuy Sizing Guide — How to Measure and Convert Sizes
Sizing is the number one cause of buyer regret. This guide explains how to measure yourself, read the GTBuy size charts, convert Asian sizes to US sizes, and avoid the most common fit mistakes. If you get the size right, everything else becomes easier. The QC photos will confirm quality, the shipping will deliver on time, and the item will fit when it arrives. This guide is your first step toward a perfect order.
How to Measure Yourself
For tops, measure chest, shoulder width, and length. For bottoms, measure waist, hip, inseam, and length. For shoes, measure foot length in centimeters. Use a soft measuring tape and measure over the clothing you plan to wear underneath. For chest, wrap the tape around the widest part of your chest. For shoulder width, measure from the tip of one shoulder to the other. For length, measure from the highest point of the shoulder to the bottom hem. For waist, measure at the navel level. For hip, measure at the widest part of your hips. For inseam, measure from the crotch to the ankle.
Asian Sizing vs US Sizing
Asian sizing is generally one size smaller than US sizing. A US medium is usually an Asian large. This is the most important rule. Do not order your US size without checking the chart. For shoes, the difference is less about size labels and more about internal length. Asian shoe sizes often use millimeters or centimeters. A US men's 9 is approximately 27 cm in Asian sizing. Always check the spreadsheet's size chart for exact conversions.
How to Read the Spreadsheet Size Chart
The spreadsheet includes a size chart for each item. The chart shows measurements in centimeters for each size. Compare your measurements to the chart. Do not guess. If you are between sizes, choose the larger size for a relaxed fit or the smaller size for a fitted look. For hoodies and sweaters, a relaxed fit is usually preferred. For t-shirts, a fitted look is common. For jackets, check the length chart if you are tall or short. For pants, the inseam is critical. A one-inch difference in inseam changes how the pants look completely.
Common Fit Mistakes
The biggest mistake is ordering your US size without checking the chart. The second biggest mistake is measuring body size instead of garment size. The size chart shows garment measurements, not body measurements. A hoodie with a 110 cm chest measurement is designed for someone with a smaller chest, because the garment needs room for movement. The third mistake is ignoring length for tall buyers. Asian clothing is often shorter than US brands. If you are over 6 feet tall, check the length measurement carefully. The fourth mistake is buying fitted items without accounting for layering. If you plan to wear a hoodie under a jacket, the jacket needs to be larger.
Shoe Sizing
For shoes, measure your foot length in centimeters. Compare to the shoe's internal length. Add 0.5-1 cm for comfort. Some shoes run narrow. Check the width notes if you have wide feet. Basketball shoes fit true to size but require break-in. Running shoes with knit uppers stretch slightly. Sneakers generally run half a size small for wide feet. Designer loafers and formal shoes need precise length. Width is harder to adjust, so check the width notes carefully.
Layering Considerations
If you plan to wear a hoodie under a jacket, the jacket needs to be larger. If you plan to wear a t-shirt under a hoodie, the hoodie can be true to size. Think about your full outfit when choosing sizes. For winter outfits, consider the total thickness of your layers. A thick hoodie plus a t-shirt adds 2-3 cm to your chest measurement. A thin thermal layer adds less. Plan your outfit before ordering. This prevents the disappointment of a jacket that is too tight over your hoodie.
Frequently Asked Questions
Should I size up for all items?
Generally yes for tops and outerwear. Asian sizing runs one size smaller than US. For shoes, check the internal length. For pants, compare inseam to your favorite pair.
What if my measurements fall between two sizes?
Choose the larger size for a relaxed fit or the smaller size for a fitted look. For hoodies and jackets, larger is usually better. For t-shirts, either works depending on preference.
Do sizes shrink after washing?
Cotton items shrink 2-3% after the first wash. Synthetic blends shrink less. If you are between sizes, choose the larger size to account for shrinkage.
Summary
By taking five minutes to measure yourself and read the chart, you eliminate the most common cause of returns and disappointment. The GTBuy spreadsheet is accurate, but only if you use the size chart correctly. Measure, compare, and order with confidence. Your future self will thank you.
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