GTBuy Sizing Guide — How to Measure, Compare, and Order the Right Fit Every Time

Why Sizing Is the Biggest Problem on GTBuy

Every experienced buyer will tell you the same thing: sizing is the hardest part of ordering. The GTBuy spreadsheet is a powerful tool for finding the right batch, but it only works if you order the right size. A perfect batch in the wrong size is still a bad purchase. That is why this guide exists.

The problem is not that the GTBuy spreadsheet lacks sizing data. It is that beginners do not know how to use it. Size polls, measurements, and fit reports are all in the spreadsheet, but they are only helpful if you know how to interpret them. This guide teaches you how to read that data and apply it to your own body measurements.

Step 1: Measure Yourself Correctly

Before you open the GTBuy spreadsheet, you need accurate measurements. Do not guess. Do not rely on your usual size. Batch sizing varies, and the only way to order correctly is to start with your own data.

For shoes: Measure your foot length in centimeters. Stand on a flat surface with your heel against a wall. Mark the longest point of your toe. Measure that distance. Do both feet. Use the larger measurement. Write it down. This is your reference number.

For clothing: Measure your chest, waist, hips, and inseam. Use a soft tape measure. Measure your chest at the widest point. Measure your waist at the narrowest point. Measure your hips at the widest point. Measure your inseam from crotch to ankle. Record all four numbers.

For headwear: Measure your head circumference where the cap will sit. This is usually just above the ears. Record this number.

Step 2: Find the Size Chart in the GTBuy Spreadsheet

Once you have your measurements, open the GTBuy spreadsheet and find the item you want. Each entry has a size chart column. The chart shows the actual measurements for each size in that batch. Do not compare the size chart to retail. Compare the size chart to your own measurements.

For example, if your chest measurement is 102 cm, and the size chart shows a Large as 104 cm, the Large is your size. If your chest is 102 cm and the size chart shows a Large as 108 cm, the Large will be too big. Check the Medium instead.

Step 3: Read the Size Polls

The size polls are the most valuable sizing tool in the GTBuy spreadsheet. They are compiled from actual buyers who have already received their items. Each poll shows the percentage of buyers who found the item true-to-size, too small, or too large.

Here is how to read them:

• 80% true-to-size: Order your usual size. The batch is consistent.
• 60% true-to-size, 30% too small: Consider sizing up. The batch runs small.
• 50% true-to-size, 40% too large: Consider sizing down. The batch runs large.
• Mixed results with no clear majority: Read the comments. Some buyers might have specific body types that explain the variation.

The size polls also include comments. Read them. If multiple buyers say "length is fine, but sleeves are short," you know the batch has a specific fit issue. If you have long arms, this batch is not for you. If you have average arms, it is fine.

Step 4: Account for Shrinkage

Shrinkage is the hidden variable that ruins perfectly sized orders. The GTBuy spreadsheet includes shrinkage data when it is known. Some fabrics shrink significantly after the first wash. Others are pre-shrunk and stay stable.

For hoodies and sweaters, expect 1-3% shrinkage on cotton blends. If the size chart shows a chest of 110 cm, expect the actual post-wash chest to be 107-108 cm. For T-shirts, shrinkage is usually 2-4%. For denim, shrinkage is minimal but the fabric may stretch over time.

The GTBuy spreadsheet notes pre-shrunk status when available. If the batch is pre-shrunk, order your usual size. If it is not pre-shrunk, consider the shrinkage in your calculation. A slightly oversized item that shrinks to your size is better than a perfectly sized item that shrinks to be too small.

Step 5: Consider Layering and Fit Preference

The GTBuy spreadsheet size charts show measurements, but they do not know your fit preference. Some people like a tight fit. Others like a loose fit. Outerwear is usually ordered slightly oversized to accommodate layers. Hoodies are often ordered oversized for a streetwear look. T-shirts are usually ordered true-to-size for a clean fit.

Before you order, decide how you want the item to fit. Then add or subtract from your measurements accordingly. If you want a loose hoodie, add 4-6 cm to your chest measurement and find the size that matches. If you want a fitted jacket, subtract 2-3 cm and find the matching size.

Category-Specific Sizing Tips

Shoes: Always use foot length in centimeters. Do not convert to US sizes. The GTBuy spreadsheet uses centimeters for consistency. Check the size poll for each batch. If the batch runs narrow, add 0.5 cm to your measurement for width.

Hoodies and Sweaters: Measure your chest and add 4-6 cm for a relaxed fit. Check the length measurement. Some hoodies are cropped. Others are long. The GTBuy spreadsheet includes length data. If the length is too short, the hoodie will look wrong even if the chest fits.

T-Shirts: Measure your chest and shoulder width. Check the size chart for both. Some T-shirts fit the chest but are too narrow in the shoulders. The GTBuy spreadsheet includes shoulder width when available.

Pants and Shorts: Measure your waist and inseam. The GTBuy spreadsheet includes both. Check the rise measurement. Low-rise pants sit differently than mid-rise pants. If you are unsure, go mid-rise for versatility.

Jackets: Measure your chest with a layer underneath. Add 6-8 cm for winter jackets. Add 4 cm for light jackets. The GTBuy spreadsheet includes layering recommendations for some batches.

Headwear: Measure your head circumference. Most caps are adjustable. Fitted caps require precise sizing. The GTBuy spreadsheet includes sizing guides for fitted caps.

What to Do When the Size Chart and Polls Conflict

Sometimes the size chart says one thing and the size polls say another. This usually happens when the size chart is based on the pre-wash measurements but the polls are based on post-wash experience. When this happens, trust the polls. They are based on real buyers wearing real items.

If the polls are mixed, read the comments. If the comments are mixed, order the size that fits your primary measurement and hope for the best. The GTBuy spreadsheet is accurate, but it cannot predict every body type. The community data is as close as you can get.

Final Sizing Checklist

Before you confirm your order, run through this checklist:

• Have you measured yourself in the last 30 days? Bodies change.
• Have you compared your measurements to the batch size chart?
• Have you read the size poll for this batch?
• Have you checked for shrinkage data?
• Have you accounted for your fit preference?
• Have you checked the length, sleeve, or rise measurement for clothing?
• Have you considered the item's purpose? Layering? Casual? Sport?

If you answer yes to all of these, your size choice is as accurate as possible. Order with confidence. The GTBuy spreadsheet is designed to make this process reliable, but it only works if you use the data correctly.