How to Choose the Right T-Shirt Size at That One T-Shirt

Buying a T-shirt should be easy — but anyone who’s ever ordered the wrong size knows how frustrating it can be. At That One T-Shirt, we want you to get the perfect fit the first time. Here’s a simple, practical guide to help you pick the right size when shopping on www.thatonetshirt.com.

1. Start With Your Measurements (Not Your Usual Guess)

Different brands size their T-shirts differently, which is why knowing your actual measurements matters. Before choosing a size on That One T-Shirt, grab a measuring tape and note:

• Chest – Measure around the fullest part of your chest.

• Shoulder width – From one shoulder point to the other.

• Length – From the top of your shoulder to where you want the T-shirt to fall.

• Sleeve length (if applicable).

These numbers are your best guide when comparing to our size chart.

2. Match Your Measurements to Our Size Chart

Every product on That One T-Shirt includes a detailed size chart. Compare your measurements directly — don’t rely on “I usually wear a medium.”

If you're between sizes:

• Prefer a more relaxed, easy-going fit? Size up.

• Want a more fitted, close-to-body look? Pick the smaller size—as long as the chest measurement isn’t too snug.

3. Pay Attention to Fabric Type

The fabric affects how your T-shirt fits and feels. At That One T-Shirt, we use multiple materials, and each behaves differently:

• 100% cotton can shrink slightly after the first wash.

• Pre-shrunk cotton stays closer to its original size.

• Cotton blends offer less shrinkage and more shape retention.

• Stretch fabrics tend to be more form-fitting.

Always check the fabric details on the product page before selecting a size.

4. Think About Your Body Shape & Fit Preference

A “Large” doesn’t look the same on everyone. Here’s what to watch for:

• Shoulder seams should sit right on top of your shoulders.

• Chest shouldn’t feel tight or pull horizontally.

• Length should fall around mid-hip — long enough to stay in place, short enough to look clean.

At That One T-Shirt, we design our pieces to work with most body types, but your preferred fit matters too.

5. Take Advantage of Our Customer-Friendly Exchange Policy

We get it — sometimes even your best guess doesn’t nail the fit. That’s why That One T-Shirt offers easy exchange options. If the size isn’t quite right, swapping it out is simple and stress-free.

6. If You’re New to Our Brand, Start With One T-Shirt

If it’s your first time shopping with us, consider ordering a single shirt to confirm your ideal size. Once you know your perfect That One T-Shirt fit, you can shop confidently across the entire collection.

Final Thoughts

Choosing the right T-shirt size doesn’t have to be complicated. When you know your measurements and understand how our fabrics and fits work, finding your perfect That One T-Shirt becomes effortless.